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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.

Tell us what you think! Help us create more open space connections and preserve local agriculture

Please take a little time to share your ideas to help Boulder ensure an inclusive open space future, with welcoming outreach and volunteer programming, and to help the community preserve and enjoy Boulder’s agricultural lands. Please provide your thoughts by midnight, Dec. 18. Your input will help identify strategies for the Open Space and Mountain Parks (OSMP) Master Plan, which will guide the management of Boulder's open space over the next decade and beyond. 

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: 

  • Sanitas Valley Trail work: Starting Wed., Dec. 12, visitors will encounter intermittent delays while OSMP conducts maintenance work along the Sanitas Valley Trail.
  • NCAR-Skunk Canyon Trail closed: The trail will be closed December 1-21 because of Xcel electric construction work. This closure will be in effect 24 hours a day.
  • NCAR-Table Mesa/Bear Trail closed: Trail is closed because of Xcel electric construction work. This closure is in effect 24 hours a day and is expected to continue until December 7. 
  • East Boulder/White Rocks Trail bridge closed

Project Updates & Other Alerts

Integrated Site Projects: OSMP is currently developing Integrated Site Projects (ISPs) for several specific OSMP locations, including the Wonderland Lake area and OSMP's Gebhard property on the South Boulder Creek corridor southeast of the East Boulder Community Center. Learn more about the ISPs

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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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

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