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Open Space and Mountain Parks

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

Trail closures related to Xcel transmission line work: OSMP visitors may encounter temporary trail closures and delays southwest of Boulder this summer while Xcel Energy replaces transmission lines in the area. Because of the rugged location of transmission lines in Bear Canyon, longer-term trail closures in the area are likely to occur beginning in August. OSMP recognizes the impacts this transmission line work is having on residents and visitors, and we appreciate your patience while this work occurs.

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: 

  • Fourth of July Trailhead closure July 30-31, 2018: The upper parking lot at the Fourth of July Trailhead/Buckingham Campground will be closed from 8 am–5 pm on Monday, 7/30 and Tuesday, 7/31 for general maintenance.
  • 1st/2nd Flatiron Trail work: The trail will be closed Monday through Thursday every week, beginning June 4. 
  • East Boulder/White Rocks Trail bridge closed

Project Updates & Other Alerts

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 pdf about how additional community input helped refine draft focus areas and related topics, and sign up for email updates.

Rocky Mountain Greenway Soil Sampling: The City of Boulder is part of a multi-agency partnership supporting the development of the Rocky Mountain Greenway in Jefferson and Boulder County including an underpass beneath Colorado Highway 128 connecting Boulder’s open space trails with the Rocky Mountain Greenway and the Rocky Flats National Wildlife Refuge. Part of the partnerships due diligence is conducting soil sampling to address public health and safety concerns. The draft soil sampling and analysis plan (SAP) is now available for review.  Visit Jefferson County's site to review and comment on the draft SAP, learn more about the partnership and sign up for project updates. Learn more.

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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Featured Projects & Pages

Osprey with a fish it caught

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.

Close up of trail map showing parking fee symbol

Open Space Parking Permits and Fees

Visitors whose vehicles are registered outside of Boulder County can now purchase OSMP annual parking permits online. Learn more about parking permits.

Couple hiking on a trail

OSMP Regional Trail Efforts

OSMP is committed to working with other city departments, Boulder County and other partner agencies to advance regional trail connections.

Junior Rangers moving large rock

Junior Ranger Program

Summer jobs for teens! The Junior Ranger Program engages teens on OSMP to serve, discover and grow! Recruitment is closed for 2018.

Dog on a trail wearing Voice and Sight Tag

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 2018.

Ranger teaching fishing program

OSMP Ranger Naturalists

Open Space and Mountain Parks Rangers work to protect the trails and rich and diverse public landscapes here in Boulder.

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Interactive Trail Map

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