All-Out Spring Fever
North Area Athletic Complex 19500 West 64th Pkwy, Arvada, CO, United StatesFrom the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 11th annual Spring Fever from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along with its Endless Series sidekick in October… Kooky-Spooky, these 5K, 10K & Half Marathon courses will hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail […]
Central Park 5K
Stapleton Central Park 8801 Martin Luther King Jr Blvd, Denver, CO, United StatesIs 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 neighborhood!
Polar Plunge 5K
Aurora Reservoir 5800 S Powhaton Rd, Aurora, CO, United StatesThe 2024 Polar Plunge season is fast approaching, so get ready to RUN, PLUNGE, OR BOTH to raise funds and awareness for Special Olympics Colorado! Don't miss the Westerra Credit Union Aurora Polar Plunge presented by Murdoch's Ranch & Home Supply on Saturday, April 6 at Aurora Reservoir (5800 S. Powhaton Rd., Aurora, CO)! Event […]
RMRR Spring Marathon Training Series #1
Platte River Trailhead Park Colorado Blvd and E 88th Ave, Thornton, CO, United StatesThese Marathon training races are geared towards people training for spring marathons. They are supported runs with aid stations and are timed and scored. There are both 10 mile and 20-mile distances for people who are training for either a half marathon or a full marathon. Come and join us for a fun, competitive training […]
Run the Ranch Trail Runs
Sylvan Dale Guest Ranch 2939 N CR 31D, Loveland, CO, United StatesFor the 5th year running and benefiting the Heart J organization, we are bringing back an amazing and beautiful trail race to Loveland, CO. You will have 6 distances to choose from. Come run on beautiful trails on private land at Sylvan Dale Guest Ranch. The views alone are to die for! There are different […]
PPRR Nielson Challenge
North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United StatesRace Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]
Elevate Kids 5K/10K
Las Colonias Park Riverside parkway, Grand Junction, CO, United StatesThis event is for all ages and abilities, whether you're in it to win or out for a fun Sunday morning walk. Come out and take a step to help kids in Grand Junction by participating in the 2.5K, 5K, or 10k distance. *The really littles, 4 & under, can participate in the free Hatchling […]
RMRR City Park 4M
City Park - Denver 1700 N York St, Denver, CO, United StatesEveryone – slow, fast, or in-between – can win at RMRR Trophy Series races. With our handicap scoring system, we predict YOUR finish time based on recent running results, giving you a great goal to shoot for whatever your speed. Just show up an hour before the start and we’ll get you ready for your race. It’s an […]
Donut Dash
Washington Park - Denver 701 S Franklin St, Denver, CO, United StatesThe Donut Dash 5K is Denver’s race that ends with doughnuts. Runners and walkers can take advantage of a flat and fast course, and then enjoy fresh doughnuts at the finish. Our mission is to bring people together to have a fun, fit morning.
Rockin’ on the River 5K
Hudson Gardens and Event Center 6115 S Santa Fe Dr, Littleton, CO, United StatesDust off your well-loved t-shirts and show 'em off at the Rockin' on the River 5K! Pre and post-race music and entertainment for all. Take in the view along the beautiful South Platte River on the Mary Carter Greenway in Littleton.
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.