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Open Space and Mountain Parks

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 citizens 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 details on the following closures. OSMP's interactive trail map also shows current trail closures.

  • Muddy trail closures as of Apr. 24: Trails in the Marshall Mesa, Greenbelt Plateau, Flatirons Vista, Doudy Draw and Springbrook areas, and the Left Hand Trail from Boulder Valley Ranch to Neva Rd are closed because of muddy conditions. View more information about the muddy trail closures.
  • Foothills South Trail closed: from the Utica Ave. access to Four Mile Canyon Creek, more information: osmpprojects.org 
  • Red Rocks Trail closed 
  • East Boulder/White Rocks Trail bridge closed
  • Boulder Falls Trail closed:  Starting as early as  Monday, Feb. 12, OSMP will begin work to repair Boulder Falls. 

Project Updates & Other Alerts

Pilot Cobalt and Eagle Trail Use Designation Changes: Open Space and Mountain Parks (OSMP) is seeking input to determine whether it needs to re-designate the Eagle and Cobalt trails. Recently, visitors expressed concern about the possibility of injuries on the Eagle Trail  because a short section of it is significantly steeper and more technical than all other trails in the Boulder Valley Ranch area. Learn more and share your feedback. 

OSMP Master Plan: Open Space and Mountain Parks has kicked off a long-term effort to establish a community-supported plan that will guide the management of the community’s open space over the next decade and beyond. 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

Open Space & Mountain Parks Calendar

«April 2018»
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View main city calendar for more upcoming events

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Featured Projects & Pages

Osprey with a fish it caught

Osprey Cam Live!

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.

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! Apply by April 1, 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.

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.

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Interactive Trail Map

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