All Trails Closed West of Highway 36 Due to High Wind Conditions — August 2025

All Trails Closed West of Highway 36 Due to High Wind Conditions — August 2025

Boulder County Parks & Open Space has closed all trails and trailheads west of Highway 36 due to sustained winds exceeding 80 mph and extreme fire danger conditions. The closure includes all mountain parks, open space properties, and county trails in the foothills. Closures will be reassessed when wind conditions subside.

Environmental review of the project area near SH-119 Diagonal Highway found 10 sensitive species and 2 wetland areas requiring mitigation. The Parks & Open Space worked with Colorado Parks and Wildlife to develop a habitat conservation plan.

Public comment on this matter can be submitted through the Boulder County online portal, by email to Parks & Open Space, or in person at the next Board of County Commissioners meeting. Written comments received by 5:00 PM the day before the hearing will be included in the public record.

Timeline

Residents in the Nederland area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Parks & Open Space at (303) 441-8770 to verify eligibility and requirements.

The project includes improvements along SH-119 Diagonal Highway between Nederland and the intersection with Nelson Road. Construction is scheduled to begin in July 2026 with completion expected within 12 months.