Boulder County, Colo. - The Boulder County Sheriff’s Office is investigating the robbery and assault of a 73-year‑old man who was attacked while hiking near the 40,000 block of Boulder Canyon Drive on the evening of June 29, 2026.

According to investigators, the victim was hiking down the Boulder Creek Trail around sunset when he was approached by a man who accused him of stealing a marijuana joint belonging to the suspect’s girlfriend. Earlier on the trail, the victim had asked the woman for a drag of the joint, which she allowed, and he returned it before continuing his hike.

The suspect followed the victim down the trail, repeatedly confronting him about the joint as the victim walked toward his vehicle parked west of Boulder Canyon and Canon Park Drive. The suspect then attacked the victim from behind, causing him to lose consciousness. The victim awoke just before American Medical Response (AMR) personnel arrived and was transported to a local hospital.

Medical staff at the hospital determined the victim suffered serious injuries consistent with blunt-force trauma. The victim’s wallet, containing his bank cards, driver’s license, and cash, was missing.

The suspect fled the area and has not been identified. The suspect has been described as a male as in his late 20’s, approximately 5'06", around 130lbs, and muscular. He had medium brown hair, was wearing a tan t-shirt and olive green pants, and spoke with an unidentified accent.

The Sheriff’s Office is requesting assistance from the public. Detectives are seeking any witnesses who were in the area around 9:00 p.m. on June 29, or anyone with information that may help identify the suspect or persons of interest. You are asked to contact Boulder County Sheriff’s Office detectives at BCSOtips@bouldercounty.gov or 303-441-3674.

The associated Boulder County Sheriff’s Office case number is: 26-03012.

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/s/ Carrie Haverfield, Sr. Communications Specialist