Closures & Construction

Construction-Related Travel Impacts

Boulder County Transportation manages the construction projects for roads, bridges, pathways, drainage improvements and trails. The projects listed on this page are related to flood recovery and regularly scheduled roadway maintenance.

Travel Impacts

County Road Projects

Twin Lakes Trail Connections Project area map

Williams Fork Trail Multi-Use Path Enhancements – Spine Road to Idylwild Court

  • Twin Lakes Road will be SOUTHBOUND ONLY (ONE-WAY) at Brandon Creek Drive starting Wednesday, Feb. 19
    • Road is too tight to complete concrete roadway panel replacement without one-way configuration
    • This alignment will be in place for two weeks (24 hours a day, seven days a week)
    • Detour signage will be posted.
  • Work hours = 8 a.m. to 4:30 p.m. — January through May
  • Project website
Road Closed sign

N. 61st/N. 63rd Street CLOSED between Hygiene Road and CO 66

Starting Monday, Jan. 20, N. 61st St. and N. 63rd St. between Hwy 66 and Hygiene Rd. will be closed to through traffic. Specifically, the closure will be just south of the bridge over St. Vrain Creek on 61st St. All residents on 61st and 63rd streets will have access to their driveways and properties. The closure will be in place for approximately two months. The work is being completed by Boulder County Parks and Open Space. Project website.

Thank you for following restrictions! We apologize for any inconvenience.

For more information about Boulder County road travel impacts, please contact – Andrew Barth – 303-441-1032

Projects Impacting Cycling

Fourmile Canyon Drive/Gold Run Road


    • 4:30 p.m. on Monday, Dec. 23, 2019 to 8 a.m. on Thursday, Jan. 2, 2020
  • Regular Restrictions – No recreational/non-resident cycling in Fourmile Canyon
    • 8 a.m. to 4:30 p.m. – Monday through Friday
  • Cycling permitted on major holidays
    • Independence Day – Thursday, July 4
    • Labor Day – Monday, Sept. 2
  • Residential cycling exception – Residents must contact Boulder County Transportation for pass
    • Residents can contact Andrew Barth (info below) to obtain a residential cycling pass
  • Restrictions in place due to increased volume of large truck traffic associated with three construction projects

Thank you for following restrictions! We apologize for any inconvenience.

Project Contact – Andrew Barth – 303-441-1032

Non-County Projects

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Boulder, CO 80304

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Boulder, CO 80306