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Open Space and Mountain Parks

Open Space and Mountain Parks

Boulder's Open Space and 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 residents 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 more details on the trail closures below. OSMP's interactive trail map also shows these longer-term trail closures and restrictions: 

  • Muddy trail closures: Please check the trail map or temporary closures page for any muddy trail closures.
  • Trailhead closures occurring March 19-26: Several trailheads will have one-time closures during this timeframe; view the closure schedule
  • NCAR-Skunk Canyon and NCAR/Table Mesa-Bear Trails: Xcel is completing work in the area and these trails may see intermittent closures.
  • East Boulder/White Rocks Trail bridge reopened March 15, 2019: The trail section is no longer closed.

Project Updates & Other Alerts

OSMP administrative offices have moved: The offices relocated to 2520 55th St. in Boulder.

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 and Mountain Parks Calendar

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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 working on a trail

Junior Rangers Youth Jobs

2019 Junior Ranger Team Member applications are now live! Junior Rangers are passionate, motivated teens who want to work together to make a difference on OSMP.

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 2019.

Volunteers working on a trail

Trails 2019: A Public Open House

OSMP held an open house on Feb. 26 to discuss upcoming 2019 trail projects, including projects at Bear Canyon Trail, Fern Canyon and Mesa Trails, and others.

Couple hiking on a trail

OSMP Regional Trails

OSMP is committed to working with other city departments, Boulder County and other partner agencies to advance regional trail connections.

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Interactive Trail Map