Join volunteer naturalists and astronomers from the Longmont Astronomical Society for a series of summer night astronomy programs. Together we'll learn about the night skies and view the celestial bodies residing in our galaxy and beyond. The constellations that make up the astrological signs follow the path of the ecliptic along with the moon and the planets. Find out what the ecliptic is and how Astronomy and Astrology are out of sync because of the procession of earth. Bring a chair or blanket, a light jacket, and a red flashlight, and get ready to enjoy a night out with the family. The presentation is at the picnic shelter. It is followed by stargazing in the parking area. Telescopes are provided by the Longmont Astronomical Society. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

Come and discover Hall Ranch Open Space! Whether you have visited many times or this is your first, this program will reveal a Hall Ranch that you have never known. While taking a moderate 2-mile hike, we’ll tell stories, share fun facts, and explain the unique natural and cultural history of this open space property. You’ll use your powers of observation to interpret the natural environment at Hall Ranch. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

Drop by anytime during the open house to go inside the historic Altona Schoolhouse where students studied and played from 1880 to the World War II era. Volunteers will be on hand to share the school’s history and restoration with visitors. If time allows, you can take part in a game or spelling bee. Park at the Corral Trailhead at Heil Valley Ranch and hike 10 minutes on Schoolhouse Loop to the Altona School. Registration not required.

Join us for an easy 3-mile walk around Stearns Lake. Immerse yourself in the vibrant blooms and buzzing life of a native prairie on this gentle summer stroll. A few benches are available on the trail. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

Have you ever been curious about the different grasses that grow along Boulder County trails? Join volunteer naturalists for a short 2-mile hike at Rabbit Mountain to learn about the early season grasses of the foothills. We’ll search for different grasses, talk about their vital role in the ecosystem and buffering climate change, and explore the area’s special biodiversity values. Look closely and you might just develop a new appreciation of our beautiful, yet often, overlooked grasses! Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

Join volunteer naturalists for a slide program to kick off the wildflower season! You’ll learn about the diversity of wildflowers in Boulder County from the plains to the alpine, where, and when to look for them, and some interesting stories about some of our native plants. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

Join us as we explore the central role that pollinating insects and their habitats play in functioning ecosystems. On our hike along the creek, we’ll gain a better understanding of how important pollinators are. For they are crucial to the lives of humans and other wildlife, from songbirds to bears. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

Summer Catfish Night is an opportunity for anglers to fish at night when Stearns Lake is usually closed. Bring your family and friends and enjoy a summer night fishing at the lake! • Anglers must have current Colorado fishing license (kids under 16 years don’t need a license) • Open to shore fishing only • Artificial and live bait permitted • Check-in required at the trailhead on South 104th Street Registration not required. Event will not be canceled due to rain. Note: access the trailhead from Dillon Road on South 104th Street. You cannot get to the trailhead from 287 through Rock Creek Farm. For more information, please call Dave Hoerath at 303-678-6204. The next Catfish Night event is Friday, July 19, 7:30-11 p.m. Boulder County wants to ensure that everyone has equal access to our programs, activities, and services. To request an Americans with Disability Act (ADA) accommodation, please email ada@bouldercounty.gov, or call 303-441-1386. Submit your request as early as possible, and no later than two business days before the event. If you need help in another language, please email posinfo@bouldercounty.gov, or call 303-678-6277. Contact us as early as possible, and no later than three business days before the […]

This hike is for anyone who likes looking at birds or just wants something fun and different to do in the outdoors. We welcome those who identify as LGBTQ+, allies, families, or anyone who wants to enjoy an inclusive outdoor experience. This will be a slow hike covering 1.5-miles or less. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.

The geologic history of Boulder County’s remarkable landscape goes back nearly two billion years! Rocks contain a record of the earth’s history that can be read like the pages in a book. Join volunteer naturalists for this slide program and learn how to read this fascinating story in the rocks. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.