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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

Limited parking on Flagstaff Mountain. Flagstaff Mountain continues to be busy on the weekends. Parking is extremely limited. For your safety & the safety of others, do not park along the side of the road. Illegally parked vehicles can be ticketed and towed. Consider visiting different locations. Plan your visits through or download the Boulder AreaTrails App.

Always bring a face covering when leaving your home. Anyone over 12 years old is required to wear face coverings anytime they cannot maintain six feet of distance at OSMP trailheads and when passing others on trails. If visitors are at least 6 feet away from others, they do not need to wear a face covering over their nose and mouth. However, if visitors reach 6 feet distance to someone else on the trail, they should put the covering back over their nose and mouth. Learn more.

Siempre traigan un cobertor facial cuando salgan de su hogar.  Cualquier persona mayor de 12 años requiere usar un cobertor facial cuando no pueda mantener una distancia de 6 pies (2m), ya sea en las entradas de los parques o cuando pasen a otros en el sendero. Si los visitantes están a más de 6 pies (2m) de otros, no necesitan usarlo para cubrirse la nariz y la boca. Sin embargo, si los visitantes se acercan a 6 pies (2m) o menos de distancia de alguien en el sendero, deben cubrirse la nariz y la boca.

Stay on trail and walk through mud. If needed, step off to maintain distance. Please avoid stepping on vegetation. If possible, step onto a rock or a bare spot to let others pass, then step back on the trail. Politely announce yourself if you need to pass others. Traveling off trail, whether hiking, running or biking, can permanently damage vegetation and widen trails. Learn more.

Proteja a las personas, quédese en casa.  Si es indispensable salir, practique la recreación responsable. Mantenga 6 pies de distancia física, use cobertores de cara y evite viajes innecesarios.  Para más información. 

COVID-19 closures and cancellations

Many Open Space and Mountain Parks (OSMP) community programs, such as nature hikes and education programs, have been suspended. City parks and OSMP trails will remain open. The city also has closed all city buildings and facilities to the public. Learn more about other city services through the city’s COVID19 (novel coronavirus) webpage. These OSMP closures and cancellations are effective through Monday, June 1.

  • Parking and picnic tables at Lost Gulch and Cathedral Park on Flagstaff are closed to comply with a public health order and to limit public gatherings. 
  • OSMP Hub at 2520 55th Street is closed. Most in-person services can be completed online. See below.
  • OSMP's Ranger Cottage is closed.
  • All OSMP public programs, including Voice and Sight Tag Program education classes, nature hikes and education programs are canceled.
  • Wonderland Lake community engagement planned for late March and April (Engagement Window #3) has been postponed.
  • One-day group volunteer events and projects are also canceled. 
  • OSMP is not currently issuing new special-use permits for large groups on city-managed open space. It also advises that bookings of OSMP facilities for weddings and other events may be subject to change. 

OSMP permits can be obtained online:

Muddy Trail Closures

OSMP Closed Trails
Muddy trail closures as of Saturday May 30, 2020.

No trails are currently closed due to muddy conditions.


Other Trail Closures and Advisories

IBM Connector underpass flooded May 29, 2020
The IBM Connector underpass at the Diagonal Highway is flooded with a few feet of water. The pump is working, but it will likely take a few days to drain. 

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

Marshall Mesa Trailhead temporary closure June 3, 2020
The Marshall Mesa Trailhead will be closed for maintenance from 6 am until work is completed on Wednesday, June 3. Trails in the area will remain open unless they are closed because of muddy conditions.  

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

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. 

Flagstaff Summit Road closed to vehicles 
The Flagstaff Summit Road is closed to vehicles, but visitors may still access the Summit Road on foot. 

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.

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.