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Open Space and Mountain Parks

Open Space and Mountain Parks

Boulder's Open Space & Mountain Parks (OSMP) are a very special place. The open space lands teem with native plants and wildlife and are home to threatened and endangered species. They serve as a buffer between Boulder and nearby development. They sustain agriculture uses and add untold benefits to the natural environment - clean air, water, and earth.

The lands shape the urban mosaic of the Boulder Valley and provide citizens with passive recreation opportunities. Trails are used by walkers, hikers, bicyclists, horseback riders, dog walkers and other passive recreational uses.

OSMP Alerts

Trail/Trailhead Closures

Please see the temporary closures page for details on the following closures. OSMP's interactive trail map also shows current trail closures.

  • Muddy trail closures as of May 20: Trails in the Marshall Mesa, Greenbelt Plateau, Flatirons Vista, Doudy Draw and Springbrook areas, and the Left Hand Trail from Boulder Valley Ranch to Neva Rd are closed because of muddy conditions. View more information about the muddy trail closures.
  • Community Ditch Trail leash-required: Dogs must be on leash east of Highway 93 because of coyote activity. 
  • East Boulder/White Rocks Trail bridge closed
  • Boulder Falls Trail closed:  Starting as early as  Monday, Feb. 12, OSMP will begin work to repair Boulder Falls. 

Project Updates & Other Alerts

Prescribed burning on Shanahan Ridge: The City of Boulder’s Open Space and Mountain Parks (OSMP) Department and Boulder Fire-Rescue are anticipating conducting prescribed burning on Shanahan Ridge through May 31. This prescribed burning will help create a perimeter for a larger burn that is anticipated to occur later this month or in the fall. Learn more at PlannedBurns.org.

OSMP Master Plan: Fill out a brief questionnaire by May 20 about draft focus areas for the OSMP Master Plan. We've developed these draft management themes with input from 2,000 community members. Learn more and sign up for email updates.

Purchase OSMP annual parking permits online:  Visitors whose vehicles are registered outside of Boulder County can now purchase OSMP annual parking permits online. Learn more about parking permits

Open Space & Mountain Parks Calendar

«May 2018»
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View main city calendar for all upcoming city events, or for more events like this

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Featured Projects & Pages

Junior Rangers moving large rock

Junior Ranger Program

Summer jobs for teens! The Junior Ranger Program engages teens on OSMP to serve, discover and grow! Recruitment is closed for 2018.

Osprey with a fish it caught

Osprey Cam Live!

View OSMP’s Osprey camera. Get a glimpse into the lives of a pair of Osprey nesting on OSMP. Watch them begin nesting, feeding and raising their young.

Dog on a trail wearing Voice and Sight Tag

Voice and Sight Tags

Information on how to register for the Voice and Sight Tag Program or renew your dogs' Voice and Sight Tags for 2018.

Close up of trail map showing parking fee symbol

Open Space Parking Permits and Fees

Visitors whose vehicles are registered outside of Boulder County can now purchase OSMP annual parking permits online. Learn more about parking permits.

Ranger teaching fishing program

OSMP Ranger Naturalists

Open Space and Mountain Parks Rangers work to protect the trails and rich and diverse public landscapes here in Boulder.

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Interactive Trail Map

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