Nederland Community Briefing: All Trails Closed West of Highway 36 Due to High Wind Conditions

Nederland Community Briefing: All Trails Closed West of Highway 36 Due to High Wind Conditions

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.

Boulder County has partnered with the cities of Boulder, Longmont, Lafayette, and Louisville on this project. Combined investment across all jurisdictions totals $424,000, making it one of the largest collaborative efforts in the county’s history.

The project includes improvements along SH-119 Diagonal Highway between Lyons and the intersection with SH-7 / Ute Highway. Construction is scheduled to begin in June 2026 with completion expected within 11 months.

Background

A community information session will be held at the Lyons library on Thursday, April 16 at 5:00 PM. Translation services in Spanish and Nepali will be available. The session will also be livestreamed on the Boulder County YouTube channel.

Environmental review of the project area near SH-119 Diagonal Highway found 8 sensitive species and 4 wetland areas requiring mitigation. The Clerk & Recorder worked with Colorado Parks and Wildlife to develop a habitat conservation plan.

What You Need to Know

Data from the 2025 Boulder County Community Survey shows that 60% of respondents rated this service as “important” or “very important.” The survey, conducted every two years, received 6,059 responses from residents across the county.