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!

Help improve our interactive trail map!

Open Space and Mountain Parks is interested in learning how we can improve your experience when using our interactive web map. Your input on a quick 5-minute questionnaire will inform our work to help the community better connect with OSMP. View the map and survey.

Muddy Trail Closures

Other Trail Closures and Advisories

Boulder Falls closure beginning Monday, Oct. 21, 2019
The Boulder Falls trail and parking lot will be closed beginning Monday, Oct. 21 because of the highway construction in the area. The closure will be 24 hours per day everyday of the week until the construction in the area is complete. 

Xcel Energy electric transmission work-related closures through December 2019
Xcel Energy is continuing its multi-phased project to replace and reconstruct most of its electric transmission infrastructure southwest of Boulder. Xcel began work on National Center of Atmospheric Research (NCAR) land and city open space the week of July 22, 2019 requiring a long-term closure of the NCAR-Bear Connector Trail on federal lands. Visitors along the NCAR-Bear Canyon and Mesa trails may also see periodic full-day and intermittent short-term -- less than 15 minutes -- closures while work is underway. Visitors may see heavy construction equipment and helicopters while this utility work is occurring. Xcel anticipates that this project may take up to two years to complete because of several factors – including the transmission line’s location, electrical service requirements, weather, and raptor nesting closures. 

Xcel has also resumed work on OSMP lands in Bear Canyon west of Mesa Trail. This work will lead to periodic full-day and intermittent short-term -- less than 15 minutes -- closures of the Bear Canyon Trail west of Mesa Trail. This project is anticipated to be completed by December.

View a map of the trail closures and impacts or see the table below. 

If you have a question or comment regarding this work, please send an email to [email protected] or call 303-571-7089. 

IBM Connector Trail closure beginning Sept. 11, 2019
The IBM Connector Trail will be closed west of 63rd St. for construction related to the Southern Water Supply Project II (Carter Lake Pipeline). Construction work will begin Wednesday, Sept. 11, and is expected to last through Feb. 2020. More information on the project can be found on the Water Utilities Division Carter Lake Pipeline page.

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.

1st/2nd Flatiron Trail weekday closures beginning June 3, 2019
The 1st/2nd Flatiron Trail will be closed 8 am to 4:30 pm Monday through Thursday every week while repair work is done. The closure will start at the base of the 1st Flatiron. Climbers may climb the 1st and hike down the trail, but may encounter significant delays. The closure is expected to last until the fall.

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.