Show/Hide

The City of Boulder welcomes your feedback. Use our Inquire Boulder customer service tool to tell us what’s on your mind.

  • OSMP Trails & Recreation
  • OSMP Visitor Info
  • OSMP Get Involved
  • OSMP Nature & Restoration
  • OSMP - About
  • OSMP Kids & Families
  • OSMP Plans & Reports
  • OSMP en Español

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.
  • Sunshine Canyon Trail closure: The trail will be closed from 7:30 am to 4:30 pm on Wednesday Dec. 18 for fuel mitigation and material removal work occurring in the area.
  • Boulder Falls closure: Boulder Falls will be closed beginning 10/21 because of road construction in the area. 
  • IBM Connector Trail closure: The trail will be closed west of 63rd St. beginning 9/11. 

Project Updates & Other Alerts

Prairie Dog public process: The City of Boulder has begun an expedited review of how it manages irrigated agricultural fields and prairie dogs later and is seeking input on ways it can foster healthy soils and promote sustainable agricultural land uses. Learn more

Wonderland Lake ISP: Share input for Wonderland Lake: To help create a set of management actions for Wonderland Lake area, Open Space and Mountain Parks (OSMP) is seeking to gauge the level of support for various ideas the department heard from community members this summer. Share your inputLearn more about this project

Tall Oatgrass Management Program: City of Boulder Open Space and Mountain Parks (OSMP) will host a neighborhood meeting from 5:30 to 7 p.m. on Thursday, Dec. 5, to inform community members of proposed work to expand livestock grazing on Shanahan Ridge open space. The meeting will be held at Southern Hills Middle School, 1500 Knox Drive. Grazing and its associated livestock fencing are an important part of a continuing OSMP restoration project to help contain tall oatgrass – a highly invasive, non-native grass – in the area. 

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.

Open Space Board of Trustees Meeting

@ 6 to 8 p.m.

The OSBT usually meets on the second Wednesday of every month. Please view the agenda for meeting information, including start time and location.

Open Space Board of Trustees Meeting

@ 6 to 8 p.m.

The OSBT usually meets on the second Wednesday of every month. Please view the agenda for meeting information, including start time and location.

View main city calendar for all upcoming city events, or for more events like this

Subscribe to this feed

Featured Projects & Pages

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.

See more articles like this

Interactive Trail Map