Boulder Canyon Trail Closure Due to Rockfall Mitigation Work — April 2024

Boulder Canyon Trail Closure Due to Rockfall Mitigation Work — April 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.

Water quality monitoring at 18 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2026. The Assessor’s Office publishes quarterly water quality reports on the Boulder County website.

The Board of County Commissioners will review progress on this initiative at their May 28 business meeting. Agenda items and supporting documents are posted on the Boulder County website 72 hours before each meeting.

Next Steps

The project includes improvements along South Boulder Road between Niwot and the intersection with Flagstaff Road. Construction is scheduled to begin in June 2026 with completion expected within 14 months.

The Assessor’s Office processed over 1,735 applications last year, with an average processing time of 21 business days. Staff are available at the Niwot office Monday through Friday from 8:00 AM to 4:30 PM.