Colorado Cold Snap

Colorado Cold Snap is held in Louisville, Colorado, on January 17, 2027. Two road distances are offered: the 10K at 9:40 AM and the 5K twenty minutes later at 10:00 AM. The staggered starts keep the two fields from sharing the same opening stretch.

Mid-morning starts and short distances make this a manageable winter race, and the altitude along Colorado's Front Range is the factor to plan around if you are traveling in: your pace at a given effort will be slower than at sea level, so race by feel rather than by a number from home. For local runners, the 5K works as a sharp January effort and the 10K as a fitness check ahead of a spring build. Six to eight weeks of steady running with one longer weekend run covers either distance comfortably.