Welcome to Racing Colorado Online!

Your source for Colorado race calendars for running, cycling (road and mountain bike), triathlon / multisport, and Nordic sports.  Just browse the calendars to find event details, entry forms, and links to race sites. It's easy to find a great Colorado 10K, 5k, marathon, cycling race/ride, triathlon, or winter sport. 

One online source for your complete running calendar, cycling calendar, triathlon calendar and Nordic events calendar.

FEATURED RACES

Second Wind Fund Run/Walk/Ride This marquee community event will feature a 5k run (Bolder Boulder qualifier), 3 mile walk, or 2 or 4 mile bike ride through the hilly Green Mountain neighborhoods.  Event activities include a free BBQ lunch, massages, t-shirts, concerts, kids' activities, and a memorial dove release.

Run The `Rocks 5K Run the 'Rocks is a walk/run challenge matched with electrifying musical reverb at the world-famous amphitheatre crafted by Mother Nature herself. Whether you want to run like mad, or slowly inhale the fabulous panorama, you don't want to miss this unique Red Rocks event!