- May 29, 2021 to May 31, 2021
Lace your sneakers for this 10K version of the BOLDERBoulder. Choose one of six locations (Littleton, Broomfield, Firestone, Loveland, Erie, or Larkspur), the day, and time for your run when you register. You can also join virtually, from anywhere. Registration includes race swag, treat, access to the Facebook group, and more.