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.
- Trailhead closures occurring March 19-26: Several trailheads will have one-time closures during this timeframe; view the closure schedule.
- NCAR-Skunk Canyon and NCAR/Table Mesa-Bear Trails: Xcel is completing work in the area and these trails may see intermittent closures.
- East Boulder/White Rocks Trail bridge reopened March 15, 2019: The trail section is no longer closed.
Project Updates & Other Alerts
OSMP administrative offices have moved: The offices relocated to 2520 55th St. in Boulder.
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
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View main city calendar for all upcoming city events, or for more events like this
Featured Projects & Pages
Open Space and Mountain Parks Master Plan
Learn about the OSMP Master Plan, what we've heard from the community so far, what's ahead and how you can get involved.
Live Boulder Osprey Cam
View Boulder's live osprey camera. Get a glimpse into the lives of a pair of osprey nesting. Watch them begin nesting, feeding and raising their young.
Junior Rangers Youth Jobs
2019 Junior Ranger Team Member applications are now live! Junior Rangers are passionate, motivated teens who want to work together to make a difference on OSMP.
Voice and Sight Tags
Information on how to register for the Voice and Sight Tag Program or renew your dogs' Voice and Sight Tags for 2019.
Trails 2019: A Public Open House
OSMP held an open house on Feb. 26 to discuss upcoming 2019 trail projects, including projects at Bear Canyon Trail, Fern Canyon and Mesa Trails, and others.
Open Space and Mountain Parks Integrated Site Projects
OSMP is developing Integrated Site Projects (ISPs) for several specific OSMP locations, including the Wonderland Lake area, Gebhard property and Gunbarrel Hill.
OSMP Regional Trails
OSMP is committed to working with other city departments, Boulder County and other partner agencies to advance regional trail connections.
Interactive Trail Map