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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.
  • Boulder Falls closure: Boulder Falls will be closed beginning 10/21 because of road construction in the area. 
  • Xcel Energy electric transmission line work: Xcel is working in the NCAR area; please check the temporary closures page for details.
  • IBM Connector Trail closure: The trail will be closed west of 63rd St. beginning 9/11. 

Project Updates & Other Alerts

Ecosystem health and resilience projects open house: OSMP invites community members to an open house on Thursday, Nov. 7, to learn about city efforts to preserve and restore natural areas and sensitive wildlife and plant habitats.  This information session, like the trails open house OSMP held earlier this year, will provide community members an opportunity to learn about ecological projects the department has been working on and is planning to conduct next year.

Prairie Dogs public process: The City of Boulder has begun an expedited review of how it manages irrigated agricultural fields and prairie dogs later and is seeking input on ways it can foster healthy soils and promote sustainable agricultural land uses. Learn more

Tall Oatgrass Management Program: Learn about why it's so important to aggressively manage tall oatgrass in Boulder County and what OSMP is doing about it:

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

Free, public Nature Hikes and Programs can be found at NatureHikes.org.

Open Space Board of Trustees Meeting

@ 6 to 8 p.m.

The OSBT usually meets on the second Wednesday of every month. Please view the agenda for meeting information, including start time and location.

Open Space Board of Trustees Meeting

@ 6 to 8 p.m.

The OSBT usually meets on the second Wednesday of every month. Please view the agenda for meeting information, including start time and location.

Open Space Board of Trustees Meeting

@ 6 to 8 p.m.

The OSBT usually meets on the second Wednesday of every month. Please view the agenda for meeting information, including start time and location.

Open Space Board of Trustees Meeting

@ 6 to 8 p.m.

The OSBT usually meets on the second Wednesday of every month. Please view the agenda for meeting information, including start time and location.

View main city calendar for all upcoming city events, or for more events like this

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Featured Projects & Pages

Elk in grass

OSMP Ecological Restoration Open House

Join OSMP staff to learn about department wide restoration projects focused on improving the condition and function of the native ecosystems around Boulder.

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.

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Interactive Trail Map