Moose Mudder
Altitude Elementary School 27300 East Southshore Drive, Aurora, CO, United StatesPlease join us for the Annual Moose Mudder! This is a community event that will consist of an untimed 1k fun walk/run and a timed 5k followed by an optional muddy obstacle course. Get your best time, run for fun, walk with a group, form a stroller brigade, or line the streets to cheer everyone […]
Western Colorado Trail Running Camp
Wine Country Inn 777 Grande River Drive, Palisade, CO, United StatesJoin us for a long weekend full of trail running adventures in the colorful desert landscape of Western Colorado's wine country. Life's 2 Short Fitness is teaming up with Becoming Ultra coaches for this special co-ed trail running camp for all levels. Enjoy coached workouts/clinics, guided hikes and runs for all levels, recovery yoga, cold […]
Mountain Ridge Trail Race
Mountain Ridge Middle School 10590 Mountain Vista Ridge, Highlands Ranch, CO, United StatesMountain Ridge takes place near Highlands Ranch primarily on the Douglas County East-West Regional Trail. This gently rolling course will keep the Heart Rate pumping while offering some of the best views in the front range. The Mountain Ridge Trail Race will once again start and finish from Mountain Ridge Middle School, and offer 100% […]
Valkyrie Women’s Trail Race
Cheyenne Mountain State Park 410 JL Ranch Heights, Colorado Springs, CO, United StatesValkyrie Trail Race was created as a women only trail/ultra event, featuring Colorado Spring’s, Cheyenne Mountain State Park. The race offers amazing views of the city and a diverse eco-system. We have several different distances available, so everyone in your running group can participate! 50K/Marathon/30K/Half Marathon/8 Mile/4 Mile
Colorado Women’s Classic
Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United StatesWe 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 […]
Mother’s Day 5K
City Park - Denver 1700 N York St, Denver, CO, United StatesThe 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 […]
Endure Trail Runs
Mueller State Park 21045 State Highway 67, Divide, CO, United StatesThe 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’s Revenge Trail Race
YMCA of the Rockies - Estes Park 2515 Tunnel Rd., Estes Park, CO, United StatesSamson 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 […]
Colfax 5K
City Park - Denver 1700 N York St, Denver, CO, United StatesCome 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 […]
Colfax Marathon
City Park - Denver 1700 N York St, Denver, CO, United StatesCome 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 […]
Please click here to submit your event for FREE to our online calendar.
We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.