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OSMP Projects

The City of Boulder’s Open Space and Mountain Parks (OSMP) Department will highlight large projects for 2018 on this page. 

Xcel Electric Line Replacement and Trail Projects near NCAR

Xcel Energy is replacing electric transmission line infrastructure on city-owned open space and utility lands. 

Trail Closures

The NCAR-Skunk Canyon Trail is closed Dec. 1, 2018 - Jan. 31, 2019* view the NCAR-Skunk Canyon closure map pdf. The NCAR-Table Mesa/Bear Trail is open, but will see periodic, daily closures through January.

*End date of the project is dependent on weather and other factors and may change. 

Xcel has completed its work for the year in Bear Canyon

Xcel Energy has halted its electric transmission work in Bear Canyon. Additional electrical line work in the area isn't expected again until mid-2019. When it occurs, it will likely be of a much shorter duration, according to Xcel Energy. 

Eldorado Canyon to Walker Ranch Connection

A group of three local and state governments have proposed a preliminary interagency recommendation for a multi-use trail connection between Eldorado Canyon State Park and Walker Ranch. After collaboration to complete a Trail Feasibility Study and careful consideration of the findings, Boulder County Parks & Open Space, the City of Boulder Open Space and Mountain Parks, and Colorado Parks and Wildlife are jointly recommending the North Route (using segments N1-N2-N4) as the preferred alignment for an Eldorado Canyon to Walker Ranch multi-use trail connection. Please visit the project website to learn more.  

OSMP Master Plan

OSMP Master Plan logo

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. Share your comments now and sign up for email updates

Rocky Mountain Greenway

The City of Boulder is part of a multi-agency partnership supporting the development of the Rocky Mountain Greenway in Jefferson and Boulder County.   

Information about Open Space and Mountain Parks’ and the Rocky Mountain Greenway
Information about the Rocky Mountain Greenway trail connection between Boulder Open Space and Rocky Flats National Wildlife Refuge

Completed Projects

NCAR-Bear Canyon Trail - Bear Creek Riparian Restoration Project

This project is complete and the NCAR-Bear Canyon Trail is open. 

This project along NCAR-Bear Canyon Trail, between the Stony Hill access and the NCAR-Bear Connector Trail, completed some of the department’s final 2013 flood-recovery work to repair trails and restore wildlife and plant habitats in the area. 

Riparian areas (land adjacent to streams) are critical habitat for a variety of wildlife species and plants - click on the photos below to view some of these riparian species. This project involved re-grading the site to make it suitable for planting native shrubs, which are important habitat for the Preble’s meadow jumping mouse (a Federally-listed threatened species), shrub-nesting birds, and other wildlife species. The project was required per conditions of OSMP’s City wetlands permit, to mitigate for area impacts associated with other trail repairs after the September 2013 flood. Additionally, the project included a short re-route and drainage improvements to this section of trail.

PlumBlue-gray GnatcatcherChokecherryGolden CurrantSpotted TowheeYellow-breasted chatPreble's meadow jumping mouse

See full photo set in the Photo Gallery

Boulder Falls

Boulder Falls opened Friday, June 8, 2018. Repairs began in February and included replacing gabion baskets, slope stabilization and trail widening. Additional site improvements will continue in 2019. Thanks for your patience as OSMP works to repair and improve this area.

Boulder Falls Trail construction work Completed Boulder Falls Trail work


South Foothills Trail

In March-May 2018, an OSMP contractor completed repairs of 2/3 mile of the Foothills South Trail from the Utica Ave neighborhood access north to Four Mile Creek. The trail was damaged by the September 2013 flood, which removed the gravel trail surface (crusher fines) and caused erosion. The trail had several drainage features installed to help lessen the potential for future erosion damage. Trail re-construction statistics include:

  • 12 rolling dips constructed on the trail to divert water off of the trail surface and prevent erosion.
  • Over 1400 linear feet of trailside ditch constructed to divert ground surface water away from the trail.
  • The trail surface was re-constructed at 8 feet wide (the same as the pre-construction width), with a 4-inch layer of crusher fines gravel installed as the trail surface.  336 cubic yards of crusher fines (enough to fill 4 ½ city buses!) were used on the project.

Future improvements are scheduled for the Foothills South Trail in upcoming years, including a new bridge over Four Mile Creek, and a short re-route on the section leading down to Wonderland Lake to reduce ongoing erosion issues.

Foothills South Trail before and after reconstruction