Lace up: this calendar lists upcoming run and walk events across Colorado. It covers charity 5K walks, holiday fun runs, 10Ks, half and full marathons, trail races, relays and costume runs, put on by nonprofits, schools, running clubs and race companies.

Race season builds in spring, peaks in summer and stays strong through the crisp fall months, while turkey trots, jingle bell runs and New Year’s Day races keep the winter calendar alive. Front Range races offer fast, flat options on paved paths, and mountain towns host scenic trail and road races at altitude. Most events welcome walkers, strollers and first-timers, and many raise money for local causes.

Open a race for distance, start time and registration links. Race directors can add a run or walk free on Colorado Under Par and reach participants statewide.

Run / Walk FAQ

Can I walk a 5K race?
Yes, most 5K events welcome walkers. Check the course time limit before you sign up.

When is race season in Colorado?
Races happen year round, with the most events from spring through fall. Holiday themed runs fill late November and December.

How do I train for my first race?
Start with a few short runs or walks per week and build slowly. Many local running clubs offer free group runs.