We are excited to return to Westminster for the 2024 Colorado Women's Classic! While focused on women, all genders are WELCOME at this event! 10M, 10K and 5K races. We will run this event rain or shine! :) This is THE race for ALL. THE. GOODIES. The Colorado Women's Classic is about the POSITIVE parts […]

This exciting half marathon course is a fun loop on the beautiful flowy single track in Fruita CO. With short steep climbs and descents featuring beautiful views of the nearby buttes and mesas runners will enjoy 13.8 miles of gorgeous open early season desert. This race is part of the Adventure Fest at 18 Road […]

The Denver Mother's Day 5K – It's What Colorado Moms Do! This year, all-you-can-eat pancakes and three sausage breakfasts with OJ or coffee will be provided by Flippin' Flapjacks for all registered participants. The Denver Mother's Day 5K is excited to announce LIVE music this year! Aspire Healthy Energy Drinks is bringing their Aspiring Artists Micro Music Festival to […]

The Frank Shorter Track Classic is a track meet honoring one of America's greatest distance athletes. Each year, we will celebrate Frank's career, his devotion to the sport of running and promotion of health and fitness, while also acknowledging a different Boulder Olympian. This year's meet will take place on May 21st at Nevin Platt Middle School in Boulder.

A new Race Series for Colorado with 2 races over the Weekend for both WOMEN/Moms and their families!....Saturday, MAY 10th, 5k & Family 1 mile in Denver at GREAT LAWN PARK, then on Sunday in LOUISVILLE- COMMUNITY PARK for the 5k, 10k and Family Mile Trail Races. Take your choice. DENVER- Expo opens at 8:30am, […]

Question:  Is it supposed to be DO NOT STOP, or DONUT STOP?  Answer:  YES! Like Running or Walking?  Love Donuts?  This race is for you! Join us for the annual Donot Stop 5k/10k and half marathon! A donut-themed event that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), […]

The Dash & Dine 5k run, Boulder’s favorite spring tune-up run series is back for 4 races in May at the beautiful Boulder Reservoir in Boulder, CO.

Colorado Veterans Project is set to host the eighth annual Memorial Day Run & March, which will raise funds and collect non-perishable food donations for local veterans experiencing homelessness. Athletes may participate in a 5K, 10K or 30K run, or choose to ruck march, where each athlete will carry a 25-pound rucksack filled with non-perishable […]

The Endure 12-Hour is a one-of-a-kind challenging 12-Hour timed event, designed by YOU… and tiny colorful balls. Each runner will pull colored balls from a bucket, which determines the loop they’ll next run. This continues for up to 12-hours in time, and the runner’s result is the number of miles they ran within the allotted time. […]

Samson was the celebrity elk of the Rockies until he was illegally poached in 1995 on YMCA grounds. Our race runs on Samson's home turf, The YMCA of the Rockies, which his descendants still call home. The course is fast single track with a big King of the Mountain challenge slapped in the middle. This […]

Come join over 21,000 runners from all over the world in the Mile High City! 2 Days, 8 Races means a distance for everyone! 26.2 Marathon through the stadium, fire station, downtown, Sloan’s Lake, Colfax Ave, 7 miles of water 13.1 Half Marathon through Denver Zoo, Denver Fire Station, downtown, Colorado Firefighter Calendar on course Urban 10 […]

The Vallecito Lake Heavy Half Marathon is a beautiful and scenic course around Vallecito Lake. Nestled in the heart of the San Juan Mountains in Colorado, our race course takes runners completely around the picturesque Vallecito Reservoir with a special section that runs right across Vallecito Dam. If you ever wanted to run all the […]

The Boneyard Boogie kicks off the 2025 Vail Trail Running Series with a 14K or 6K scamper through pinyon groves and juniper shrubs on some of Eagle's most scenic single track trails, with an elevation gain of 1,279 feet, reaching a maximum elevation of 7,718 feet. Both races will start and end at the Eagle […]

The Spirit Challenge Run for Autism offers three different distances, a 10k, 5k and Kid’s Fun Run. All races are on paved roads, except for the 5k which has a short section on trail. The Kid’s Fun Run is an 800m run consisting of 2 laps around the Steamboat Springs Middle School track. The Spirit […]

Walk MS 2024 includes a powerful new experience where you’ll witness how your support changes the lives of people with MS and gets us closer to our ultimate goal: a cure. Whether you live with MS, love someone who does, or are a part of the wider community, you can proudly display your role in […]

Grab your family and friends (don't forget Fido!), your running (or walking) shoes, and join us as we raise funds for FOCP- Friends of Charlie's Place (the Clear Creek and Gilpin County Animal Shelter) and CCMRD Youth Programs. This fun and fast course travels both paved and dirt trails along scenic Clear Creek. Shelter dogs […]

Join us for the Stem Ciders at Acreage 5k on May 17, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Lafayette. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft cider or beer at the finish line. Start […]

Join us on Saturday, May 17 or Sunday, May 18, 2025 for Run to the Shrine, Cheyenne Mountain Zoo’s annual fundraiser run/walk. This 4-mile casual run/walk winds through the Zoo and up to Will Rogers Shrine of the Sun, with leopards, lions and elephants along the way. Enjoy stunning views of Colorado Springs below while ascending […]