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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.

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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.
  • NCAR-Skunk Canyon Trail closed: The trail will be closed December 1, 2018 to February 28, 2019 because of Xcel electric construction work. This closure will be in effect 24 hours a day. 
  • East Boulder/White Rocks Trail bridge closed

Project Updates & Other Alerts

Trails 2019: A Public Open House: Curious about upcoming trail projects that OSMP has scheduled? Come to our open house to learn more about projects at Bear Canyon Trail, Fern Canyon and Mesa Trails, and others. View more information about the open house.

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

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.

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.

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Interactive Trail Map