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 residents with passive recreation opportunities. Trails are used by walkers, hikers, bicyclists, horseback riders, dog walkers and other passive recreational uses.
Trail closures related to Xcel transmission line work: Starting Tuesday, June 19, OSMP visitors will encounter multi-day closures southwest of Boulder while Xcel Energy removes electric transmission lines. This work is anticipated to last for five days. Anticipated closures include the South Mesa Trailhead and portions of the Mesa Trail. View a map of upcoming trail closures . To help ensure visitor safety in the project site area, these closures will be in effect at all times (24 hours, each day).
- Muddy trail closures as of June 19: Left Hand Trail is being closed. Trails in the Marshall Mesa, Greenbelt Plateau, Flatirons Vista, Doudy Draw and Springbrook areas are closed because of muddy conditions. View more information about the muddy trail closures.
- 1st/2nd Flatiron Trail work: The trail will be closed Mon. through Thurs. every week, beginning June 4.
- Community Ditch and Coal Seam Trails leash-required: Dogs must be on leash east of Highway 93 because of coyote activity.
- East Boulder/White Rocks Trail bridge closed
Boulder County fire restriction: Boulder County has enacted Level 1 Fire Restrictions, effective June 12, for western Boulder County. OSMP grills and fireplaces are closed because of the ban. More information from Boulder County on what's included in the ban.
OSMP Master Plan: See a video about recent community engagement and learn how the draft focus areas emerged from your input. Learn more about how additional community input helped refine draft focus areas and related topics, and sign up for email updates.
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.
Featured Projects & Pages
Summer jobs for teens! The Junior Ranger Program engages teens on OSMP to serve, discover and grow! Recruitment is closed for 2018.
View OSMP’s Osprey camera. Get a glimpse into the lives of a pair of Osprey nesting on OSMP. Watch them begin nesting, feeding and raising their young.
Learn about the OSMP Master Plan, what we've heard from the community so far, what's ahead and how you can get involved.
Information on how to register for the Voice and Sight Tag Program or renew your dogs' Voice and Sight Tags for 2018.
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 Rangers work to protect the trails and rich and diverse public landscapes here in Boulder.
Interactive Trail Map