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

- OSMP to increase enforcement of Voice and Sight Tag Program changes: When the program updates took effect, OSMP rangers focused on educating and warning dog guardians about changes to the program in order to promote compliance. Now enforcement will transition to citations of guardians whose off-leash dogs do not have current Voice and Sight Tags. Previously issued green tags are no longer valid. Visit voiceandsight.org to start the process to obtain a 2015 blue tag.

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

Sanitas Valley Trail closed
Section of South Boulder Creek Trail on both sides of US 36
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