All Trails Closed West of Highway 36 Due to High Wind Conditions — December 2026
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.
The project includes improvements along Nelson Road between Nederland and the intersection with Sunshine Canyon Drive. Construction is scheduled to begin in July 2026 with completion expected within 12 months.
Water quality monitoring at 10 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2026. The Sheriff’s Office publishes quarterly water quality reports on the Boulder County website.
Next Steps
Volunteers contributed over 9,102 hours to this program last year. The Sheriff’s Office coordinates with 14 nonprofit partner organizations throughout Boulder County to deliver services.
A community information session will be held at the Nederland library on Monday, April 20 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.
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