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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

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.
  • Buckingham Picnic Area, South Mesa and Centennial Trailheads: Maintenance work will close these trailheads for one day each, starting June 16.
  • 1st/2nd Flatiron Trail closures starting 6/3/19: The 1st/2nd Flatiron Trail will be closed Mon-Thurs every week.
  • NCAR-Skunk Canyon and NCAR/Table Mesa-Bear Trails: Xcel is completing work in the area and these trails may see intermittent closures.

Project Updates & Other Alerts

OSMP Master Plan Update: Thanks to all who shared feedback on the Draft OSMP Master Plan! Our fifth and final window of engagement is now closed. Next month a summary of comments on the draft plan will be available. Learn about what's coming next

The first draft of the OSMP Master Plan reflected more than 10,000 public comments and input from thousands of community members. It will get revised with additional feedback we heard during our last engagement window. 

You can also view sections of the document below:

To see community feedback that has informed the draft plan visit our What We’ve Heard page.

Tall Oatgrass Management Program: Learn about why it's so important to aggressively manage tall oatgrass in Boulder County and what OSMP is doing about it:

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

Free, public Nature Hikes and Programs can be found at NatureHikes.org.

Gunbarrel Hill Integrated Site Project

@ 5 to 7:30 p.m.

OSMP is seeking community input to help restore healthy grassland wildlife habitat while improving the visitor experience on city open space at Gunbarrel Hill.

OSMP Master Plan Process Committee

@ 12 to 1:30 p.m.

The OSMP Master Plan Process Committee aims to engage decision-makers in developing, supporting and ensuring best practices for OSMP's Master Plan.

OSMP Master Plan Process Committee

@ 12 to 1:30 p.m.

The OSMP Master Plan Process Committee aims to engage decision-makers in developing, supporting and ensuring best practices for OSMP's Master Plan.

OSMP Master Plan Process Committee

@ 12 to 1:30 p.m.

The OSMP Master Plan Process Committee aims to engage decision-makers in developing, supporting and ensuring best practices for OSMP's Master Plan.

OSMP Master Plan Process Committee

@ 12 to 1:30 p.m.

The OSMP Master Plan Process Committee aims to engage decision-makers in developing, supporting and ensuring best practices for OSMP's Master Plan.

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Featured Projects & Pages

Prairie Dogs in a field

Prairie Dogs

City plans and policies strive to strike a balance between protecting prairie dog populations and natural communities while maintaining open space land uses.

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.

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 2019.

Couple hiking on a trail

OSMP Regional Trails

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

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Interactive Trail Map