Commissioners: “We will continue to value, respect, and support all individuals as we serve the people of Boulder County.” Read full message.
Immigrant Resources, including a Know Your Rights Booklet, available on the Immigration Resources webpage.
Traffic deaths have a permanent impact on those affected by the loss. We need to work together to reach our Vision Zero goal and put safety first for everyone traveling on our roads, whether they choose to walk, bike, ride transit, or drive.
The county, along with partners Lafayette and Superior, is taking action on Vision Zero by developing through an ongoing Vision Zero Action Plan, building on the Safe System Approach.
people have died in traffic crashes
in unincorporated Boulder County.
people have died in traffic crashes
in cities and towns.
The Safe System Approach recognizes that achieving zero traffic fatalities and serious injuries requires system-level changes to how the transportation network is planned, designed, and constructed. The Safe System Approach represents a shift from conventional safety methods in that it focuses on both human mistakes and human vulnerability and designs a system with redundancies in place to protect everyone, regardless of which mode they choose for travel.
Suggest an improvement to a roadway in unincorporated Boulder County. Types of requests may include but are not limited to:
March 8, 2023, Boulder County staff from Community Planning & Permitting, Public Works, Sheriff’s Office, Commissioners Office, and the District Attorney’s Office met with the Board of County Commissioners to discuss Vision Zero work being done throughout the county.
View the March 2023 Vision Zero Update presentation or Vision Zero Update meeting video.
In 2021, Boulder County led two Vision Zero Community Partnership Meetings (previously hosted by the City of Boulder). These meetings provide an engagement opportunity for all local, regional, and state-wide agency partners, Transportation Advisory Boards, bicycle advocacy groups, local school districts, and law enforcement officials to collaborate on our Vision Zero safety goals, policies, and projects. The mission of the Vision Zero Community Partnership Meetings is to share knowledge and insight on safety goals, educational resources and campaigns, projects, etc., continue the momentum that started with the City of Boulder bringing multiple agencies, groups, and other community members together, and help push all our collective safety goals forward.
The current Traffic Crash Analysis reviews crashes from 2009 to 2018 on roads in Unincorporated Boulder County and the four incorporated mountain towns in western Boulder County (Lyons, Jamestown, Nederland, and Ward). The document analyzes crashes on Colorado Department of Transportation (CDOT) highways, Boulder County roads, and local roads within the four Mountain Towns. Crash reports for specific areas follow.
Note that the ongoing Vision Zero Action Plan will be doing a new crash analysis for the years 2009-2022.
The document reviews crashes from 2009 to 2018 on roads in the Town of Nederland and nearby roads in Unincorporated Boulder County.
The document reviews crashes from 2009 to 2018 on roads in the Town of Lyons and nearby roads in Unincorporated Boulder County.
The document reviews crashes from 2009 to 2018 on roads in the Mountain Towns of Jamestown, Ward, and Nederland and nearby roads in Unincorporated Boulder County.
Outlines Boulder County’s long-term vision for a safe and equitable transportation system, including projects, programs, and performance measures such as Boulder County’s 2035 Vision Zero goal.
An interactive map displaying all traffic crashes that occurred in Boulder County from 1999 to 2022.
31 people died in traffic crashes in Boulder County in 2021.
17 deaths in unincorporated Boulder County
14 deaths in cities and towns
Jan. 13, 7:12 a.m. – A motorist on US 36 (North Foothills Highway) in unincorporated Boulder County crossed the centerline at Hygiene Road, causing a four-vehicle crash. The driver of the at-fault vehicle was killed.
Jan. 23, early a.m. – A northbound motorist on US 287 drifted off the left side of the road at Plateau Road, striking several trees before coming to rest in a ditch. A passenger in the vehicle was killed.
Jan. 26, 3:30 p.m. – A southbound motorist on US 287 lost control of their vehicle south of Park Ridge Avenue and spun into oncoming traffic before being broadsided by a northbound motorist. The at-fault driver was killed. Icy conditions possible factor in fatal crash on U.S. 287 near Longmont Walmart – Jan. 26, 2021 .
Feb. 19, 7:03 p.m. – A southbound motorist was driving the wrong way on the shoulder of SH 93 north of SH 170 and entered the northbound lanes, colliding with two other vehicles. The at-fault motorist was killed. One killed in Friday crash south of Boulder – Feb. 19, 2021.
Feb. 25, 10:05 p.m. – A pedestrian was crossing US 287 at South Boulder Road in the City of Lafayette when it was struck by a vehicle traveling northbound on US 287.
March 7, 2:21 p.m. – A fatal crash occurred at the intersection of US 287 and Dillon Rd in the City of Lafayette.
March 31, 7:30 p.m. – An eastbound motorist on SH 66 attempted to pass another vehicle near Pace Street, causing a head-on crash. The driver of the at-fault vehicle was killed. Teen dies in head-on crash on Colo. 66 near Longmont – March 31, 2021.
April 8, 5:57 p.m. – A vehicle traveling eastbound on E 17th Ave in the City of Longmont entered the intersection of Alpine St against the red light. A vehicle traveling northbound on Alpine St approached the intersection with a green light and struck the right side of the eastbound vehicle. The driver of the at-fault vehicle was pronounced dead at the scene.
April 10, 6:40 a.m. – A northbound motorist on US 287 crossed the centerline at Niwot Road, causing a head-on crash with a southbound motorist. Both drivers involved were killed in the crash. Two drivers killed in head-on crash in Boulder County – April 10, 2021.
April 10, 2:42 p.m. – A southbound motorcyclist on US 287 was weaving in and out of traffic, causing a collision with a parked construction truck in the center median near Arapahoe Road. The driver of the at-fault motorcycle was killed. Motorcyclist seriously injured in Lafayette crash Saturday afternoon – April 10, 2021.
May 3, 12:55 p.m. – A southbound motorist on N 63rd Street veered across the northbound lane at Oxford Road and struck a set of jersey barriers. The vehicle then rolled back across N 63rd before coming to rest in a ditch. The driver involved in the single-vehicle crash was killed. Longmont man, 22, killed in car crash at 63rd and Oxford in Boulder County – May 3, 2021.
May 20, 3:00 p.m. – An eastbound motorist on South Boulder Road struck a bicyclist near Manhattan Drive. The bicyclist involved in the crash was killed. Bicyclist dies after collision with car on South Boulder Road – May 20, 2021.
May 23, 5:10 p.m. – Vehicle #1 was traveling westbound on Hwy 119 in Lane #1 attempting to turn left into a dirt pull-out just west of MP 31. Vehicle #2 (a motorcycle) was traveling eastbound on Hwy 119 in Lane #1 approaching Vehicle #1. Driver #1 failed to yield and turned left in front of Vehicle #2. After impact, both occupants of Vehicle #2 were ejected from the motorcycle. Driver #2 was pronounced deceased at the scene.
June 8, 12:12 p.m. – Vehicle #1 was traveling eastbound on Clover Basin Dr and had stopped for a red signal light at S Hover St. Ped #1 was standing at the SW corner of the intersection. When the signal light turned green for eastbound traffic, Vehicle #1 began to make a right-hand turn onto S Hover St the same time that Ped #1 began walking eastbound across the intersection in the crosswalk. Vehicle #1 then struck Ped #1 in the crosswalk.
July 15, 6:14 p.m. – A westbound motorist on Lee Hill Drive attempted to turn left onto Wagonwheel Gap Road, causing a head-on crash with an eastbound bicyclist on the road. The bicyclist involved in the crash was killed. Boulder cyclist dies after collision with vehicle – July 15, 2021.
July 16, 11:50 a.m. – A motorist on Melissa Lane attempted to turn left onto Valmont Road, causing a broadside crash with an eastbound motorcyclist on Valmont Road. The motorcyclist involved in the crash was killed.
July 22, 2:55 p.m. – A northbound motorist on US 287, just south of SH 52, rear ended another northbound motorist and then traveled onto the raised center median, causing a collision with a delineator post. The motorist continued to travel northbound on 287, eventually coming to a stop on a raised traffic island next to the right turn lane. The driver of the at-fault vehicle was killed. One person dies after crash at U.S. 287, Colo. 52 intersection – July 22, 2021.
July 26, 11:20 p.m. – A westbound motorist on SH 119 (the Diagonal Highway) made a left turn at 34th Street in front of an oncoming vehicle on the Diagonal, causing an approach turn crash. The two passengers in the westbound vehicle were killed in the crash. Two dead after crash on Diagonal Highway in Boulder – July 26, 2021.
July 27, 5:40 p.m. – A motorcyclist on SH 119 (the Diagonal Highway) was killed in a single-vehicle crash, just east of Mill Village Court. Boulder County coroner ID’s motorcyclist who died Tuesday – July 27, 2021.
Sept. 18, 8:00 a.m. – An eastbound motorist on Clover Basin Drive between Renaissance Drive and Delsarto Lane collided with an eastbound bicyclist on a recumbent bicycle. The bicyclist was killed in the crash.
Sept. 28, 10:18 a.m. – A northbound motorist on US 287 between Dawson Drive and Lookout Road traveled off the right side of the road, collided with an embankment, and eventually came to a stop on the grass shoulder. The motorist was killed in the single-vehicle crash. Lafayette man, 35, killed in rollover crash on U.S. 287 in Boulder County – Sept. 28, 2021.
Oct. 6, 12:31 a.m. – Vehicle #1 was traveling northbound in the 500 block of Main St (US 287) in the City of Longmont at a high rate of speed when it collided with a center median curb. Vehicle #1 then collided with 3 trees, several signs and a light pole before rolling over, coming to rest on the west curb line. Driver #1 was ejected from the vehicle during the rollover sequence and was pronounced deceased at the scene.
Oct. 15, 8:43 a.m. – A northbound bicyclist on SH 119 (the Diagonal Highway) between Oxford Road and N 83rd Street traveled across two lanes of traffic and collided with a northbound motorist. The bicyclist was killed in the crash. Coroner identifies Longmont cyclist who died in Friday crash – Oct. 15, 2021.
Oct. 17, 2:10 a.m. – A northbound motorist on SH 119 (the Diagonal Highway) crossed over the northbound lanes into the center median at the intersection with Jay Road, rolled an unknown number of times in the southbound lanes of SH 119, and eventually came to a stop. The motorist was killed in the single-vehicle crash. Alcohol is a contributing factor in the investigation.
Oct. 20, 5:15 p.m. – A fatal single-vehicle motorcycle crash occurred on CO 93 just south of CO 170.
Oct. 28, 10:48 a.m. – A motorist on E 9th Avenue in the City of Longmont ran through the intersection with Pace Street, causing a broadside crash. Another car nearby was also struck and two passengers in the vehicle were injured. The motorist of the at-fault vehicle and the passenger in the same vehicle were injured. The motorist of the vehicle that was T-boned was killed in the crash. Man arrested in connection to fatal crash at Ninth and Pace in Longmont – Oct. 28, 2021.
Oct. 29, 5:25 p.m. – A fatal single-vehicle crash occurred in the 5600 blk of Flagstaff Rd.
Nov. 14, 3:33 a.m. – Vehicle #1 was traveling eastbound on Yellowstone Rd when it crossed over the intersection of Hwy 287 and lost control. Vehicle #1 then ran off the left side of the roadway and crashed through a fence, overturning an unknown number of times. Driver #1 was pronounced deceased at the scene.
Nov. 27, 5:36 a.m. – A westbound motorist on US 36 at Table Mesa Drive in Boulder ran off the right side of the road and was killed in a single-vehicle rollover crash. 24-year-old Denver man dies in Boulder rollover crash on U.S. 36 Saturday – Nov. 27, 2021.
35 people died in traffic crashes in Boulder County in 2022.
22 deaths in unincorporated Boulder County
13 deaths in cities and towns
Jan. 18, 7:15 a.m. – During the morning rush hour, near Vermillion Rd in unincorporated Boulder County, a southbound driver on US 287 crossed the centerline into oncoming traffic and collided with a northbound vehicle. The driver of the southbound vehicle died and is believed to have been under the influence of alcohol. Coroner IDs driver killed in crash north of Longmont – Jan. 18, 2022.
Jan. 20, 5:40 p.m. – During the evening rush hour, just north of Boulder city limits in unincorporated Boulder County, a northbound motorist on US 36 crossed the centerline into oncoming traffic and collided with a southbound vehicle. The driver of the southbound vehicle was killed. Drugs or alcohol and excessive speeds are believed to be factors. Head-on crash north of Boulder kills 27-year-old man – Jan. 20, 2022.
Feb. 1, 4:36 p.m. – A northbound driver on US 287 near Yellowstone Rd. in unincorporated Boulder County lost control due to snowy/icy road conditions, crossed the centerline into oncoming traffic, and collided with a southbound vehicle. The driver of the northbound vehicle died. Coroner IDs Broomfield woman killed Tuesday in head-on collision north of Longmont – Feb. 1, 2022.
Feb. 1, 4:18 p.m. – A southbound driver on US 287 between Isabelle Rd. and Arapahoe Rd. in unincorporated Boulder County lost control due to wet and slushy road conditions, crossed the centerline into oncoming traffic, and collided with two northbound vehicles. The driver of the southbound vehicle died after being transported to a hospital. One dead after Tuesday wreck on U.S. 287 in east Boulder County – Feb. 1, 2022.
March 5, 5:00 p.m. – A vehicle was traveling northbound on Hwy 119 just south of Airport Rd in unincorporated Boulder County when it ran off the left side of the roadway into the center median, overturning.
March 12, 1:33 a.m. – A vehicle was traveling westbound on Sugarloaf Rd, west of Betasso Rd in unincorporated Boulder County, when it ran off the left side of the roadway and struck a creek embankment with its front.
April 9, 11:20 p.m. – A southbound driver on CO 157 (Foothills Pkwy) in the City of Boulder was driving the wrong way in the northbound lanes near Valmont Rd and collided with an oncoming vehicle, triggering a three vehicle crash. The driver and passenger in the first vehicle that was struck were both killed. The driver of the at-fault vehicle is being investigated for impaired driving. One dead, three injured following three-car crash Saturday night – April 9, 2022.
April 14, 2:30 p.m. – A 69-year-old man drove his vehicle off the road near the intersection of 17th Ave. and Harvard St. in the City of Longmont. The driver was killed in the crash; there were no passengers and no other vehicles involved. Driver dead after single-vehicle crash at 17th and Harvard in Longmont – April 14, 2022.
April 19, 9:11 p.m. – A man was killed after being hit by at least one vehicle while trying to cross U.S. 36 on foot near mile marker 42 just outside of Superior in unincorporated Boulder County. Man hit and killed trying to cross U.S. 36 near Superior – April 19, 2022.
May 14, 12:22 p.m. – A vehicle was traveling eastbound on Hwy 66 in the City of Longmont approaching Erfert St in the left turn lane. A motorcycle was traveling westbound on Hwy 66 approaching Erfert St in the right through lane. The vehicle began to make a left turn in front of the motorcycle, causing the motorcycle to strike the passenger side of the vehicle.
May 26 – A motorcyclist on the 500 block of West Main Street in the Town of Lyons lost control of his motorcycle and crashed into a stationary object. The motorcyclist was killed in the crash. Boulder County coroner identifies off-duty firefighter who died in Lyons motorcycle crash – May 26, 2022
June 1, 11:30 a.m. – A head-on collision occurred on South Boulder Road between 68th Street and Crannell Drive in unincorporated Boulder County. The driver of the vehicle that was struck was killed. The driver of the at-fault vehicle fled the scene. Drugs and/or alcohol are believed to be factors. One in custody after fatal crash, pursuit through Boulder County in allegedly stolen vehicle – June 1, 2022.
June 1, 10:15 p.m. – A motorcyclist in the City of Longmont was attempting to make a left turn from northbound US 287 (Main St) onto westbound SH 66 and was struck by a vehicle heading southbound on US 287. The driver of the motorcycle was killed. Dacono motorcyclist killed in collision with pickup at Main Street and Colo. 66 in Longmont – June 1, 2022.
June 13 – A single-vehicle crash occurred near mile marker 17 on US 36, just west of Lyons in unincorporated Boulder County. An unoccupied vehicle was found down an embankment between the road and North Saint Vrain Creek. It is believed that the driver was thrown from the vehicle during the crash and ended up in the creek. The driver’s body was recovered from the creek a few miles downstream of the crash. Driver dies after being thrown from vehicle into North St. Vrain Creek outside Lyons – June 13, 2022.
June 18, 12:10 a.m. – A southbound dump truck on Gross Dam Road in unincorporated Boulder County went too close to the edge of the road, causing the ground underneath to give way. The truck then rolled down the embankment and into Gross Reservoir. The driver of the dump truck died. State patrol: Edge of Gross Dam Road gave out beneath dump truck in fatal Boulder County crash – June 18, 2022
June 19, 9:47 p.m. – A vehicle heading southbound on Hover St in the City of Longmont struck a pedestrian at Wedgewood Ave. The vehicle the struck a light pole and tree.
June 22, 6:53 a.m. – A bicyclist was struck by a vehicle driving eastbound on SH 7 in the City of Lafayette. The bicyclist was killed in the crash. Cyclist killed following car, bicycle crash in Lafayette – June 22, 2022
June 24, 7:36 p.m. – A vehicle in unincorporated Boulder County was attempting to make a left turn from southbound US 287 onto eastbound Isabelle Road when it was struck by a motorcycle travelling northbound on US 287. The motorcyclist was killed in the crash. Excessive speed is believed to be a factor in the crash. Motorcyclist killed in crash on U.S. 287 in Boulder County – June 24, 2022
July 28, 7:13 p.m. – A southbound vehicle on US 287 in the City of Lafayette collided with a tractor-trailer traveling east on Dillon Road. All five occupants of the vehicle were taken to the hospital, where one later died. Alcohol and distracted driving are being investigated as possible reasons for the collision. Crash kills Broomfield High School student, injures 4 others – July 28, 2022
Aug. 3, 1:27 a.m. – A vehicle traveling westbound on Third Avenue between Alpine and Lashley streets in the City of Longmont collided with a skateboarder. The skateboarder died in the crash. Coroner IDs skateboarder killed in Longmont crash – Aug. 3, 2022
Aug. 21, 5:43 p.m. – Vehicle #1 was traveling westbound on Hwy 66 approaching Weld County Road 1 in the left turn lane. Vehicle #2 was traveling eastbound on Hwy 66 in unincorporated Boulder County approaching the same intersection. Vehicle #1 failed to yield to Vehicle #2 and was struck on its front right side by the front of Vehicle #2. WCR 1 is a borderline road between Weld and Boulder County.
Aug. 30, 9:09 a.m. – A vehicle heading eastbound on Third Avenue in the City of Longmont struck and killed a pedestrian who was crossing Third Avenue northbound at Pratt Street. Pedestrian hit and killed by driver in Longmont – Aug. 30, 2022.
Sept. 9, 12:22 a.m. – A motorcyclist heading northbound on SH 119 in unincorporated Boulder County struck a deer near the intersection of Airport Rd. The motorcyclist was killed as a result of the collision.
Sept. 14, 6:00 p.m. – A motorcyclist traveling southbound on Broadway in the City of Boulder collided with an RTD bus making a left turn onto Lee Hill Drive from northbound Broadway. The motorcyclist died after being transported to the hospital. Motorcycle rider dies after north Boulder crash – Sept. 14, 2022
Sept. 17, 4:45 p.m. – A motorcyclist traveling southbound on CO 7 near MP 31 in unincorporated Boulder County lost control on the wet roadway and ran off the right side of the road.
Sept. 28, 12:22 p.m. – A vehicle travelling southbound on US 287 just north of Yellowstone Road in unincorporated Boulder County swerved into the northbound lanes and struck a northbound vehicle head-on. The driver of the northbound vehicle died. One person killed in U.S. 287 crash near Longmont – Sept. 28, 2022
Sept. 29, 7:22 p.m. – A vehicle heading westbound on Niwot Road approaching the intersection with SH 119 in unincorporated Boulder County failed to stop for the red traffic light prior to entering the intersection and was struck by an RTD bus heading northbound on SH 119. The driver of the vehicle was killed in the crash. One dead, one injured in Colo. 119 crash – Sept. 29, 2022
Oct. 9, 2:00 p.m. – A motorcycle traveling southbound on Left Hand Canyon Rd. just south of Olde Stage Rd. in unincorporated Boulder County failed to navigate a curve and entered into oncoming traffic, striking a vehicle head-on.
Oct. 19, 4:58 p.m. – A motorcycle heading southbound on SH 72 near the town of Ward in unincorporated Boulder County went off the right side of the road and crashed into an embankment. The motorcyclist died in the crash. One dead in motorcycle crash in western Boulder County – Oct. 19, 2022
Oct. 22, 8:30 a.m. – A vehicle crossing SH 119 at North 83rd Street in unincorporated Boulder County collided with a vehicle travelling northbound on SH 119. The driver and passenger in the vehicle crossing SH 119 were killed in the crash. Two dead, two injured in weekend crash in Niwot – Oct. 22, 2022
Dec. 13, 7:17 p.m. – A vehicle driving southbound on US 287 near Vermillion Road in unincorporated Boulder County crossed over into oncoming traffic and struck a vehicle headed northbound on US 287 head-on. Both drivers were pronounced deceased on scene. Two killed in two-vehicle crash Tuesday night on U.S. 287 at Vermillion Road north of Longmont – Dec. 13, 2022
Dec. 19, 4:00 p.m. – A three-vehicle crash occurred in the vicinity of Pike Rd. and Corporate Center Circle in the City of Longmont. One of the victims was airlifted to the hospital, where they later died from their injuries. Alcohol is a factor in the investigation of the at-fault motorist. Charges in Longmont crash upgraded following victim’s death – Dec. 19, 2022
22 people died in traffic crashes in Boulder County in 2023.
15 deaths in unincorporated Boulder County
7 deaths in cities and towns
Jan. 9, 5:00 p.m. – A vehicle travelling northbound on US 287 near Jasper Rd in unincorporated Boulder County crossed the painted center median and collided head-on with a vehicle travelling southbound. Both occupants of the northbound vehicle were killed in the crash. Two Longmont residents killed in crash on U.S. 287 – Jan. 9, 2023
Jan. 26, 4:00 p.m. – A vehicle travelling southbound on Foothills Parkway near Valmont Rd in the City of Boulder crossed the median and struck two vehicles travelling northbound. The driver of one of the northbound vehicles was transported to the hospital and later died of their injuries. One person dead following crash at Foothills and Valmont in Boulder – Jan. 26, 2023.
Feb. 14, 9:11 a.m. – A four-vehicle crash occurred on CO 93 at mile marker 15 in unincorporated Boulder County. The driver of one of the vehicles involved died as a result of the crash. One dead after four-vehicle crash on Colo. 93 south of Boulder – Feb. 14, 2023
March 13, 8:54 p.m. – A fatal single-vehicle rollover crash occurred on US 36 near the intersection with Groover Road in unincorporated Boulder County. One killed in single-vehicle rollover crash near Lyons – March 13, 2023
April 4, 7:33 a.m. – A vehicle travelling northbound on Hover Street near Nelson Road in the City of Longmont veered off the road and struck a tree. The driver of the vehicle died as a result of the crash. Driver dies after crashing into tree in Longmont – April 4, 2023
May 4, 10:05 p.m. – A vehicle travelling northbound on US 36 just north of Boulder in unincorporated Boulder County veered into the southbound lanes and then went off the road, flipping several times. Two of the occupants were thrown from the vehicle and declared dead on scene. A third occupant was seriously injured and taken to the hospital. Two people killed in single-vehicle rollover on U.S. 36 north of Boulder – May 4, 2024
May 2, 1:33 a.m. – A vehicle travelling eastbound on CO 119 in Boulder Canyon in unincorporated Boulder County failed to negotiate a curve and ran off the right side of the road, colliding with a large boulder. The driver of the vehicle was killed in the crash. The four other occupants were transported to the hospital with minor injuries.
May 8, 6:16 a.m. – A vehicle travelling eastbound on CO 119 in Boulder Canyon in unincorporated Boulder County failed to negotiate a curve and ran off the right side of the road and down an embankment, rolling multiple times before coming to rest in the creek. The driver was pronounced dead at the scene. Alcohol and excessive speed are considered to be factors in this crash.
May 19, 5:00 p.m. – A vehicle travelling southbound on US 287 near Yellowstone Road in unincorporated Boulder County collided with another southbound vehicle, causing the second vehicle to spin out of control and into the northbound lanes. It then collided with a northbound vehicle. Both occupants of the second vehicle were killed in the crash. Officials seek driver of red pickup involved in fatal crash – May 19, 2023.
June 24, 10:45 a.m. – A vehicle in the left turn lane at the intersection of Ken Pratt Boulevard and Bowen Street in the City of Longmont backed up to try to get into the right turn lane. While backing up, the vehicle struck a pedestrian who was crossing the road. The pedestrian was transported to the hospital and later died of their injuries. Driver accused of hitting pedestrian in Longmont – June 24, 2023.
July 3, 11:47 a.m. – A vehicle attempting to turn left from CO 72 onto southbound CO 119 south of Nederland in unincorporated Boulder County struck a motorcycle heading northbound on CO 119. The collision caused the motorcycle to overturn, and the motorcyclist was ejected. The motorcyclist was pronounced dead at the scene.
July 29, 12:08 p.m. – A motorcycle heading westbound on Lefthand Canyon Drive near Spring Gulch Road in unincorporated Boulder County crossed the centerline and hit a tandem bicycle that was travelling eastbound. After colliding with the bicycle, the motorcycle travelled off the road and collided with a large tree branch. The driver of the motorcycle was pronounced dead at the scene. Ward motorcyclist killed in Lefthand Canyon Drive crash with tandem bicycle – July 29, 2023.
July 29, 12:33 p.m. – A vehicle travelling southbound on CO 119 just south of 63rd Street in unincorporated Boulder County crossed from the right-hand lane and onto the shoulder, hitting a bicycle that was travelling southbound on the shoulder. The cyclist was transported to the hospital and later died of their injuries. 17-year-old cyclist Magnus White killed in crash outside Boulder – July 29, 2023.
Aug. 3, 3:30 p.m. – A vehicle travelling southbound on US 287 near Yellowstone Road in unincorporated Boulder County proceeded through a large pool of water on the roadway and lost control. The vehicle then spun into the northbound lanes and collided with a northbound vehicle. The driver of the southbound vehicle was transported to the hospital and later died as a result of the crash.
Aug. 3, 7:25 p.m. – A vehicle and a motorcycle collided on 30th Street between Valmont Road and Glenwood Drive in the City of Boulder. The motorcycle driver died as a result of the crash. Motorcyclist dies after colliding with SUV in Boulder – Aug. 3, 2023.
Aug. 12 – A cyclist died after colliding with another bicyclist on Eldorado Springs Drive near Eldorado Springs in unincorporated Boulder County. Bicyclist dies after crash in Eldorado Springs – Aug. 12, 2023
Aug. 12, 2:30 p.m. – A vehicle travelling westbound on Table Mesa Drive in the City of Boulder turned south onto Tantra Drive and struck a motorcycle heading eastbound. The motorcycle driver was pronounced dead at the scene. Officials investigating fatal motorcycle crash in South Boulder – Aug. 12, 2023
Aug. 24, 7:30 a.m. – A pedestrian was struck and killed by a vehicle in the area of Coal Creek Lane and West Cherry Street in the City of Louisville. Coroner’s office identifies woman killed in Louisville crash – Aug. 24, 2023.
Dec. 5, 7:22 a.m – A driver westbound on Zlaten Drive died on the scene after turning south across East County Line Road and being struck by a semi-truck which was traveling north on East County Line Road. Both vehicles went off the road northwest of the intersection. Longmont man identified following Tuesday fatal crash – Dec. 5, 2023.
19 people died in traffic crashes in Boulder County in 2024.
12 deaths in unincorporated Boulder County
12 death in cities and towns
Jan. 2, 11:59 p.m. – A driver traveling westbound on Niwot Road hit a concrete barrier on the right side of the road, just west of East County Line Road. During the crash, the passenger’s seatbelt was torn and he was ejected from the vehicle. He was pronounced dead on the scene. The driver sustained serious injuries and was transported to a local hospital. A high rate of speed and alcohol are considered to be factors in the crash. CU Boulder student, Centaurus High School graduate dies in Niwot Road crash – Jan. 2, 2024.
Jan. 3, 9:18 a.m. – At the intersection of Broadway and Alpine Avenue in the City of Boulder, a driver traveling south on Broadway and turning left/east onto Alpine struck a woman in the crosswalk walking north. The pedestrian was taken to the hospital with life-threatening injuries and died of her injuries the same day. Coroner identifies pedestrian killed crossing the street in Boulder – Jan. 3, 2024
Jan. 5, 8:42 a.m. – A head-on crash on U.S. Highway 287 north of Yellowstone Road with the northbound vehicle crossing the centerline resulted in the deaths of the drivers of both vehicles. Excessive speed is suspected in the crash. Alcohol and drugs are not suspected. Excessive speed suspected in double-fatal crash on 287 north of Longmont – Jan. 5, 2024.
Feb. 5, 10:38 p.m. – The driver going north on 30th Street struck a retaining wall on the north side of the intersection of 30th Street and Diagonal Highway. The woman was taken to the hospital with life-threatening injuries and died the next night. According to the release, officers believe speed and alcohol were factors in the crash. Denver woman dies after Boulder crash Monday night – Feb. 5, 2024.
Feb. 9, 4:20 p.m. – A two-vehicle crash in Longmont at 11th Street and Collyer Avenue resulted in one of the two drivers being taken to the hospital but dying the next day because of injuries sustained in the crash. Police did not say if the other driver was injured. Boulder man dies following Longmont crash – Feb. 9, 2024.
May 13, 5:20 p.m. – A 2-year-old girl was hit by the driver of a pickup truck while crossing a parking lot at 770 29th Street with her father, according to city officials. The child died in the hospital. Child Dies After Being Struck by Car – May 13, 2024.
May 27, 3:48 p.m. – A person driving a motorcycle southbound on CO 119 (Boulder Canyon) near Fourmile Canyon Drive lost control on a curve, hit a traffic sign, and later died from the injuries. Source: Colorado State Patrol – July 3, 2024 .
May 30, 2:37 p.m. – A person driving westbound on Nelson Road veered into the eastbound lane and collided with another vehicle. One person was killed and one person was injured. Source: Colorado State Patrol – July 3, 2024.
June 18, 3:10 p.m. – A motorcyclist and deer collided on Ute Highway just east of Lyons on Tuesday afternoon, sending one person to the hospital with severe injuries. The motorcyclist later died. – Stretch of Ute Highway east of Lyons closed Tuesday for motorcycle crash – June 18, 2024.
July 5, 1:17 p.m. – One person died and four people were taken to the hospital in a five-car crash on U.S. 287 south of Longmont and just south of Oxford Road. US 287 closes after 1 killed in 5-car crash near Longmont – July 5, 2024.
July 9, 5:45 p.m. – A 65-year-old woman was driving eastbound on Via Appia Way when she allegedly hit and killed a 59-year-old woman at the intersection of Sagebrush Way and Via Appia Way in Louisville. 59-year-old woman dead following Louisville pedestrian crash | Police & Public Safety – July 9, 2024.
July 15, 7:00 p.m. – A man driving a motorcycle was reported to have disregarded a traffic signal at US 287 and Isabelle Road. He hit the rear door on the driver’s side of a Mazda SUV. A fire then fully engulfed the SUV. The driver was able to escape out of the car through the passenger door. The motorcyclist died in the crash. Motorcyclist dies in Boulder County crash at U.S. 287 and Isabelle Road – July 15, 2024.
July 15, 2:33 p.m. – At least one person was killed in a three-vehicle crash on US-36 north of Boulder in Boulder County. 1 dead in 3-vehicle crash on US-36 in Boulder County, north of Boulder – July 15, 2024 .
Aug. 15, 9:20 p.m. – A motorcyclist was traveling north on Highway 72. Their motorcycle slid off the road as they attempted to avoid hitting an elk. The motorcyclist was killed. Source: Colorado State Patrol – Nov. 1, 2024.
Sept. 16, 1:15 p.m. – – A 36-year-old woman was cycling southbound on U.S. 36 at mile marker 32 when the driver of a pickup truck struck her with a passenger side mirror. She then crashed and the driver ran over her. She was pronounced dead at the scene. Cyclist hit, killed by mirror of pickup truck in Colorado – Sept. 16, 2024.
Sept. 27, 4:58 a.m. – In the early morning on Friday, Sept. 27, a driver traveling northbound on Broadway struck and killed a woman near the crosswalk at Rayleigh Road in South Boulder. Officers received the call at 4:58 a.m., and the woman was pronounced dead at the scene, according to officials. Fatal crash marks fourth death on Boulder streets this year – Sept. 27, 2024.
Oct. 6, 11 p.m. – A 75-year-old man was walking down the middle of Highway 36 near Longhorn Road in Boulder County. The driver of a northbound pickup truck struck and killed the man in a hit-and-run collision. 75-year-old man killed in Boulder County hit-and-run crash – Oct. 6, 2024.
Nov. 24, 1:15 p.m. – A 36-year-old cyclist and a 73-year-old runner collided at the intersection of the Creek Path and Foothills Bikeway. The pair saw each other, tried to avoid each other, collided, and both individuals struck their head on the cement as they fell. The runner was taken to the hospital in critical condition and later died of serious injury. Man Dies After Collision on Creek Path – Nov. 24, 2024.
2 people have died in traffic crashes in Boulder County in 2025.
2 deaths in unincorporated Boulder County
0 death in cities and towns
Jan. 1, 9:46 a.m. – Two parents died and their two children were injured in a single vehicle rollover crash on U.S. 36 in Boulder County, according to the Colorado State Patrol. The driver of a Jeep headed north on U.S. 36 went through the center grass median, rolled and came to rest in the southbound lanes. 2 parents dead, 2 kids injured in New Year’s rollover crash.
March 2, 4:32 p.m. – A person driving northbound on Highway 7 lost control while negotiating a right curve. The northbound vehicle overturned and slid into an oncoming southbound vehicle. The driver of the overturned vehicle was ejected. Source: Colorado State Patrol.
