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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

North Trail Study Area (TSA) Plan preliminary scenarios: OSMP has developed four preliminary scenarios for the North TSA Plan. Learn more about the North TSA Plan and the preliminary scenarios.

North TSA Plan scenario refinement workshop 10/19: Share your thoughts and help refine scenarios for the North TSA Plan at an upcoming community workshop. Each scenario includes maps displaying proposals for new trail connections, potential trail changes and possible trailhead improvements. 

- Fire ban lifted 10/5: Boulder County has lifted the fire ban for the mountain area of Boulder County. Staff is working on reopening OSMP grills and fireplaces that were locked during the fire ban. 

- New Interim Trail and Trailhead on Joder Ranch: On Friday, Sept. 18, OSMP opened a new multi-use interim trail and  interim trailhead that provide access to the Joder Ranch open space area north of Boulder. For more detailed information about how to access the trail and trailhead, along with leash regulations in the area, please visit our Interim Joder Trailhead page. Please note that the there is no trail access from the Interim Joder Trail to the Buckingham Trailhead in Lefthand Canyon, and no parking is permitted on Olde Stage Road. 

- Several trails are closed for longer-term projects: Please see the temporary closures page for details on the following closures:

  • Section of S. Boulder Creek Trail at US 36 underpass closed
  • East Boulder/White Rocks Trail bridge closed
  • Boulder Falls Trail closed
  • Anemone Hill closed - a portion of the trail is temporarily open for out and back use only

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Featured Projects & Pages

North TSA Recreation Logo

North Trail Study Area Plan

OSMP is working on the North Trail Study Area (TSA) Plan. Learn more about the plan and how you can participate in the process.

Dog on a trail with a Voice and Sight Tag

2015 Voice and Sight Tags

To let your dogs walk off-leash on Boulder open space trails in 2015, you must first take a Voice and Sight education class.

Photo of golden aster

Funded Research Program

OSMP has funding for scientific inquiry into conservation, agriculture and recreation; learn more and submit a proposal for funding.


NIST Protected Area Trails

OSMP is working with NIST to designate a trail system for visitor access and use in the NIST Protected Area.

Firewood Program

Information and instructions to obtain wood that is available to the public and a calendar showing wood availability.

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