Boulder Canyon Trail Closure Due to Rockfall Mitigation Work — December 2026

Boulder Canyon Trail Closure Due to Rockfall Mitigation Work — December 2026

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 Lyons Senior Center offers related programming including free legal consultations, tax preparation assistance, health screenings, and social activities. Over 2,396 seniors participated in center programs last year.

Residents in the Lyons area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Community Justice Services at (303) 441-1794 to verify eligibility and requirements.

Details

The project includes improvements along Niwot Road between Lyons and the intersection with SH-119 Diagonal Highway. Construction is scheduled to begin in May 2026 with completion expected within 18 months.

Climate considerations are central to this effort. Boulder County’s 2025 Climate Action Plan sets targets of reducing greenhouse gas emissions 36% below 2005 levels by 2030. This project contributes to those goals through energy efficiency improvements, renewable energy integration, and reduced vehicle miles traveled.