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Open Space and Mountain Parks

Open Space and Mountain Parks

Boulder's Open Space & Mountain Parks are a very special place. The 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

- Prescribed Fire tentatively scheduled for March 31: OSMP and Boulder Fire-Rescue are planning a prescribed burn east of 75th Street and north of Valmont Road. Learn more about this prescribed burn.

- North Trail Study Area Plan: Visit NorthTSA.org to learn more or subscribe for email updates about the plan.

- Work affecting Flatirons Vista South Trail: Work on the Flatirons Vista Reservoir could lead to temporary closure of the Flatirons Vista South Trail, learn more about this project.

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

  • Sanitas Valley Trail closed
  • Boulder Falls Trail closed
  • Gregory Canyon Access Road closed
  • Anemone Hill closed - a portion of the trail is temporarily open for out and back use only
  • Flagstaff Summit Road closed to vehicles for winter season

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Featured Projects & Pages

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North Trail Study Area Plan

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

Dog wearing a green tag

2015 Voice & Sight Tags

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

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NIST Protected Area Trails

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

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