March 2026: Boulder Canyon Trail Closure Due to Rockfall Mitigation Work
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.
Volunteers contributed over 3,307 hours to this program last year. The Sustainability, Climate Action & Resilience coordinates with 15 nonprofit partner organizations throughout Boulder County to deliver services.
Boulder County has partnered with the cities of Boulder, Longmont, Lafayette, and Louisville on this project. Combined investment across all jurisdictions totals $334,000, making it one of the largest collaborative efforts in the county’s history.
Resources
For questions about this program, contact Lisa Patel at Sustainability, Climate Action & Resilience: (303) 441-8675 or email Sustainability, Climate Action & [email protected]. Office hours are Monday through Friday, 8:00 AM to 4:30 PM. Walk-in services are available at the Nederland office without an appointment.
Funding of $334,000 for this initiative comes from a combination of federal grants, state matching funds, and the Boulder County General Fund. The Board of County Commissioners approved the allocation during the 2026 budget session.
Community Impact
The project includes improvements along Flagstaff Road between Nederland and the intersection with Sunshine Canyon Drive. Construction is scheduled to begin in May 2026 with completion expected within 18 months.
Water quality monitoring at 16 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2026. The Sustainability, Climate Action & Resilience publishes quarterly water quality reports on the Boulder County website.
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