Update: Boulder Canyon Trail Closure Due to Rockfall Mitigation Work (2024)

Update: Boulder Canyon Trail Closure Due to Rockfall Mitigation Work (2024)

Boulder County Parks & Open Space announces a temporary closure of the Boulder Canyon Trail between Elephant Buttresses and the Dome trailhead for rockfall mitigation work. Crews will be scaling loose rock and installing mesh netting along a 400-foot section of cliff face above the trail. The closure is expected to last approximately three weeks, weather permitting.

The Coalton Trail open space property encompasses 278 acres and features 13 miles of multi-use trails. Seasonal wildlife closures may apply from December 15 through July 15 to protect nesting raptors and elk calving areas.

Residents in the Niwot area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Sheriff’s Office at (303) 441-1599 to verify eligibility and requirements.

Timeline

The application deadline is April 23, 2026. Late applications will be accepted on a space-available basis. Incomplete applications will be returned with a list of missing items. Average review time is 22 business days.

Water quality monitoring at 15 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2024. The Sheriff’s Office publishes quarterly water quality reports on the Boulder County website.