ColderBOLDER 5K
Always double-check with the organizer's website! This page may contain affiliate links.
ColderBolder 5K
The ColderBolder 5K was created in 2003 and is the sister race to the BOLDERBoulder. It is locally owned and operated and regularly reaches capacity.
The course runs through the University of Colorado campus and is described as a fast route. The race finishes in the university field house, where holiday festivities and seasonal atmosphere are part of the finish area. Organizers present the event as a way to mark the start of the winter holiday season.
The event format includes 14 individual races plus a Walking Wave. The first 13 races group runners with similar prior race times so competitors race against others with comparable performances; for example, a runner who finished the BOLDERBoulder in 52 minutes would be placed with runners who finished between 52 and 54 minutes. The top three finishers in each seeded race receive Cold Medals. The 14th race is an Open Race with no qualifying standards. The Walking Wave is open to anyone who prefers a festive stroll through the CU campus and the event's winter setting.
The 2026 ColderBolder takes place on Saturday, December 5th. The event is presented as a community celebration of fitness, cold weather, the holidays, and the city of Boulder, Colorado. "Warmth is for Whiners!" Visit the organization's website for the most recent information.
