BOULDER, Colo. (CBS4) – A hiker who was killed when he fell more than 150 feet has been identified as a 21-year-old Boulder man.

Justin Bondi was hiking on Sunday afternoon with another man when he apparently lost his balance and took the fatal fall on Flagstaff Mountain just west of Boulder.

Two other hikers tried to help and do CPR, but it was too late, according to the Boulder County Sheriff’s Department.