323 Running Races in Colorado

Join us for the annual Erin Go Bragh 7.77k! This is THE LUCKIEST race on earth! There may not be a real pot of gold at the finish line of this happy-go-lucky fun run, but there WILL be UNLIMITED...

Celebrate the luck of the Irish at Lucky Brew! All participants will receive chip timing, photos, Lucky Brew performance shirt and a great after party, complete with beverages, food, awards for...

All-Out Multicourse is proud to host our 15th Annual Spring Fever, a rewarding event for both novice and experienced athletes set against the backdrop of Table Mountain and the stunning Colorado...

Is it spring or still winter?  We'll know when we run the Central Park 5k at the end of March!  Celebrate the end of winter with us on this flat and fast course in the historic Central Park...

The Donut Dash 5K is Denver’s race that ends with donuts. Runners and walkers can take advantage of a flat and fast course, and then enjoy fresh donuts at the finish. Our mission is to bring...

Welcome to the Platte River Half Marathon, Relay & 5k race, one of the most exciting and popular races in the Denver Metro Area! This race is held annually in Littleton, CO. We’re thrilled to...

Unleash your inner superhero at the 15th Annual Beat the Heat event! This year, we're calling all champions to assemble where one of Colorado's favorite trails joins one of its most glorious...

Ready to gallop around Denver with some friends?  Yeah, you are!  Come frolic with us at the Unicorn Runner 5k at Great Lawn Park to kick off your spring running season!  You'll earn a sweet tee...

The Greenland Trail Race offers four outstanding distances in southern Douglas County. Run the 4 Miler, the 8 Miler, the 25K, or tackle the 50K ultramarathon, Colorado’s fastest 50K! With Pikes...

Rise Against Suicide's 17th annual Emerge 5K Walk/Run Join Rise Against Suicide's 17th annual Emerge 5K Walk/Run- a free, family-friendly walk/run supporting youth mental health and suicide...

Early Bird Registration will open on July 1, 2026. Join us for the Colorado Marathon in Fort Collins next May! Our annual event takes place in the stunning Poudre Canyon and the gorgeous natural...

DescriptionWe are excited for the 2027 Colorado Women's Classic! While focused on women, all genders are WELCOME at this event!   We will run this event rain or shine! :) This is THE race for...

Celebrate Mother’s Day in Motion at the 2027 Denver Mother’s Day 5K! Looking for a fun, active, and memorable way to celebrate Mother’s Day this year? Join us for the Denver Mother’s Day 5K—a...

The Human Potential Running Series Presents:The Endure Trail Runs @ Mueller State Park The Endure 12-Hour is a one-of-a-kind 12-Hour timed event designed by YOU… and tiny colorful balls. Each...

Join us for three days of running excitement! Whether you're tackling the events individually or teaming up for relays: 14 mile, full marathon, 50k, 5 miles 100k,100 miles, or taking on a 7K Run...