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Temporary Closures, Advisories and Fire Bans

Trail Map

Open Space and Mountain Parks (OSMP's) interactive trail map includes trail closures - an easy option to check before your trip!

COVID-19 Alerts

Always bring a face covering when you leave home and maintain 6 feet of distance

  • You will need a face covering to visit Boulder’s open space trails and parks. Always bring one with you when you leave home.
  • Place it over your nose and mouth when you can’t maintain 6 feet of distance from others.
  • Wear it around your neck or wrist when no one else is around.
  • Parents should help children older than 2 years old properly wear a face covering.
  • Help protect vulnerable community members and each other. 

Don’t forget: Keep the space in open space! Always stay at least 6 feet from others you don’t live with or haven’t agreed to have close contact with.

Please follow these other responsible recreation reminders:

  • Visit to see current trail closures, historical data that shows areas of high and low open space use and trails that are wider than 6 feet. See when trails are busiest through our Visitation Data Explorer.
  • Protect first responders. Know your limits and don’t take unnecessary risks. 
  • Plan ahead and consider recreating closer to home as parking is extremely limited - especially on Flagstaff Mountain.
  • Remember: Leave No Trace! Pick up trash and dog waste. Stay on trail and walk through mud. Step off if you need to maintain distance but quickly step back on trail.
  • For more responsible recreation reminders, please visit the Covid-19 Recovery page.
  • Foothills pdf 

Muddy Trail Closures

OSMP Closed Trails
Muddy trail closures as of Thursday October 29, 2020.

No trails are currently closed due to muddy conditions.


Other Trail Closures and Advisories

Wildfire closures as of Oct. 29, 2020
The following areas are closed because of the fires or proximity to national forest lands:

  • Joder Trail and Trailhead
  • Buckingham Park and picnic area
  • Fourth of July Trailhead and Buckingham Campground
  • Boulder Falls

View the Boulder Emergency Operations map or website for more information on the fire. View the Wildfire Emergency Order pdf authorizing the closures.
The U.S. Forest Service has closed all national forest lands in Boulder County because of high fire danger. Read more from the Forest Service

Gregory Canyon Road/Trailhead closed Oct. 25, 2020
The road/trailhead is closed to vehicles because of hazardous conditions. 

Flagstaff Summit Road closure beginning Oct. 25, 2020
The Flagstaff Summit Road will close to vehicular traffic on Oct. 25, 2020. The road is closed to vehicles every winter, but remains open to pedestrians. 

Work occurring on part of Royal Arch Trail starting Oct. 12, 2020
The Front Range Climbing Stewards will be working for about 2 weeks on repairs and restoration to Royal Arch trail at Sentinel Pass. The trail is not closed, but there is a slight detour around where the crew is working. 

1st/2nd Flatiron Trail work beginning August 3, 2020
The 1st/2nd Flatiron Trail will be closed from 8 am to 4:30 pm every Monday through Thursday into the fall while repair work is completed. Climbers may access the First Flatiron and then downclimb through the project area, with delays possible.

Anemone Hill Trail Construction beginning May 14, 2020
Please visit for details on this project and trail closures.

Xcel Energy work continuing July 2020
Xcel Energy is continuing its multi-phased project to replace and reconstruct most of its electric transmission infrastructure southwest of Boulder beginning as soon as July 27, 2020. The work requires a long-term closure of the NCAR-Bear Connector Trail on federal lands. Visitors along the NCAR-Bear Canyon, Bear Canyon and Mesa trails may also see intermittent full-day closures and one- hour closures while work is underway. Please visit for details on this project. 

Gregory Canyon restroom closed 
The restroom is temporarily closed because of maintenance issues. This notice will be removed when the restroom has been reopened.

Chapman Drive and Boulder Falls impacted by work in Boulder Canyon
Visitor access to these areas – either by bike, by car or by foot – will be limited while the Colorado Department of Transportation conducts work in Boulder Canyon. For specific closure times, please visit the project website. Boulder Falls is currently open. Temporary closures will still occur until construction is complete. 

Rock Island 1 in Boulder Canyon closed
Rock Island 1 is closed. The rock fractured and part fell onto the Boulder Canyon Creek path. Sections of the remaining rock have been evaluated as unstable so it is closed until recommended bolting can be completed.   

No parking along Highway 170 near Doudy Draw and South Mesa Trailheads
Please remember that parking is not allowed on Highway 170 at any time.