Event details subject to change. Please confirm all information via event website.
Tour de Victory
Join the Tour de Victory Cycling Challenge, Colorado’s premier Parkinson’s bike ride benefiting the Davis Phinney Foundation. This boutique bike ride is an opportunity to join the Davis Phinney Foundation’s inspiring community and make a positive impact on the lives of people with Parkinson's. Select your preferred route (100k, 50k, or 20k) and ride any bike you like: road bikes, e-bikes, recumbents, trikes, and more are all […]
Vallecito Lake Heavy Half
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 […]
Gluten Free Gallop
Join Denver Celiacs to raise awareness of celiac disease and all gluten-related disorders. Our 13th Annual Gluten Free Gallop 5K will take place at Clement Park in Littleton, CO, on Saturday, May 16, 2026, from 9:00 AM-12:00 PM. This year we will also be offering our very popular ROCK Fun Run again! This is a […]
Ouray Backyard Ultra
A Backyard Ultra. Complete an easy 4.167 mile course. If you finish in less than an hour—just a 14:24 pace per mile—you get to do it again at the top of the hour. The race continues hour after hour until there is only one person left. To secure the win, that person must successfully complete […]
Colfax 5K
Come run City Park in the Colfax 5K! Go for a PR in this chip-timed race – separate stroller-friendly start wave for families and walkers. And, you can run with your dog in the dog wave presented by Evolution Veterinary Specialists! Afterparty with live music. A great chance to be a part of Marathon weekend […]
Colfax Marathon
New for our 20th Year! “WOW” at Every Mile To celebrate our 20th, every mile will have a WOW for runners. That moment every mile that gives you that WOW and extra energy for the miles to come. We are inviting local musicians, artisans, drumlines, choirs, … to be part of our WOW for our […]
Wild Horse Half Marathon
Set against the breathtaking backdrop of the luxurious High Lonesome Ranch, this isn’t just a race—it’s a full weekend of adventure and celebration! Runners will enjoy a country cookout, campfires, live local music, and camping accommodations. It’s the perfect blend of rugged terrain and western hospitality, complete with a lively hoedown to round out the weekend. […]
Mt Sopris Run-Off
The Mt Sopris Run-Off takes place in Carbondale, CO and offers two distances – 10-Miles and 28k. Historically this race has been a part of the Town of Carbondale’s Mountain Fair Weekend in late July. In 2026, the race will take place on Sunday, May 17th as part of a growing trail running festival weekend […]
Miles for Smiles 5K
The Miles for Smiles 5K is a friendly event that begins and ends on the track at the North Area Athletic Complex (NAAC) in Arvada with a scenic trek along the Fairmount Trail in the middle. Join Right Start Events on May 15th, 2022 for this 5K and Adaptive Dash.
Canine On the Creek 5K
Gather your family and friends, including your furry friends—don't forget Fido! Grab your running (or walking) shoes and join us in supporting FOCP (Friends of Charlie's Place), the Clear Creek and Gilpin County Animal Shelter, and CCMRD Youth Programs. The exciting course takes you through both paved and dirt trails along the picturesque Clear Creek. […]
Dash and Dine 5K #4
Boulder Reservoir 5565 N 51st St, Boulder, CO, United StatesThe 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.
Turquoise Lake 20K
The Turquoise Lake 20K offers unparalleled mountain views as you run clockwise around scenic Turquoise Lake. The first 7.5 miles of the course consists of hilly paved road. The final 5.5 miles consist of single track dirt trail.
Farish Trail Race
Date: May 23, 2026 Location: Farish Recreation Area at 12005 Rampart Range Rd Woodland Park, CO 80863 Start times: 7:00 am – 8:00 am Distance: Half Marathon, 10K, 5K 1 Mile Kids Fun Run (Free) Prizes: Top 3 Male and Female in the Half, 10K, and 5K First 200 Finishers Receive a limited edition race […]
Samson’s Revenge Trail Race
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 […]
Mile High Mile
The Mile High Mile Saturday, May 23 | Boulder High School The Mile High Mile is back for its 8th season—bringing a high-energy night of racing to Boulder for runners of all ages and abilities right at the heart of the Boulder Creek Festival and all the excitement of Memorial Day weekend in Downtown Boulder. […]
Narrow Gauge 10 Mile
Since 1978 the Narrow Gauge 10 Mile Run has been one of Durango’s oldest Memorial Day traditions. The 10-mile course showcases the Fort Lewis College rim, the Animas River Trail and great views of Durango! This is the longest continuously run road race in Colorado. In 2021, even with COVID, we had a temporary race […]
BolderBoulder 10K
We’re not sure when or how it happened, but somewhere along the way our little run in Boulder, CO turned into an event of epic proportions. We like to think it’s part race, run, jog, walk, parade, celebration and tribute. We made it for everyone.
Angel Run
Please join us on Memorial Day for the 5th Annual Angel Run in support of the local, veteran-owned 501c3 non-profit organization, Angels of America's Fallen! Gather at Red Leg Brewing for the in-person 10k and 5k run/walk or participate virtually. All proceeds of the event will be donated to Angels of America's Fallen to help […]
Memorial Day 5K
Join us for our Memorial Day 5K Fun Run & Walk at Imperial Memorial Gardens Cemetery and Funeral Home, honoring our fallen heroes while supporting victims of domestic violence. Registration is absolutely free, and all we ask is that you bring a donation of clothing or other items to support victims of domestic violence. If […]
Pyro’s River Trail Run
Honor our fallen hero and all those who have paid the ultimate sacrifice for our freedoms on Memorial Day. Choose to run the family friendly 3.5K along the beautiful Colorado River or challenge yourself on the 7.7K up the scenic mountainside then returning to the river valley. Following the race stay for the barbecue and […]
Weld Your Mettle
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 or Ruck, - there's an event for everyone. Experience the thrill of friendly competition and the energy of a supportive community! […]
North Fork Trail Race
The North Fork 50 Mile/50K is 100% trails, mainly single track and some double track, starting and finishing along lovely Buffalo Creek, in the mountains about 50 miles southwest of Denver. This is a pure ultra, a very special and unique race, deliberately kept small so each runner gets personal attention. There are no non-ultra […]
Mike the Headless Chicken 5K
Start your festival day with a race that’s anything but ordinary. Whether you're sprinting, jogging, or walking in costume, the Mike the Headless Chicken 5K is the perfect way to kick off one of Fruita’s quirkiest and most beloved events.
Pilot Hill 25K
The Pilot Hill 25K Classic is the oldest continuously run footrace in Wyoming. The race has its roots back in the 1970’s when a group of local runners and university cross country team members decided to begin their summer training by racing from Laramie to the top of Pilot Hill and back down. At that […]
Durango Trails Backyard Ultra
A Backyard Ultra is also known as a Last Person Standing Race, but don’t let this deter you from joining the fun! Complete 4.17 miles of dirt road and single track trail every hour on the Spurline Trail system in Durango. Each 4.17 mile loop is referred to as a “yard.” If you finish in […]
The PASTA Run
We are runners...and grew up running in the 1980's. Back then it was a ritual to CARBO Load the night before any race and we all love pasta...Runners love pasta...so we are bringing the 2 together, but in a different order! RUN then Eat...listen to some Italian Music, have some Ice Cream and enjoy some […]
Walk MS
Lion's Park - Cheyenne 789 S Lions Park Dr, Cheyeene, WY, United StatesWalk MS 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 the […]
Angelman Strong Superhero 5K
Calling heroes of every age and ability - we need you! We're coming together to support something bigger than ourselves -- the Angelman Strong Superhero 5K & All-Abilities Fun Run. This is more than a race, it's a mission -- a mission to support those living with Angelman syndrome, a rare condition that effects communication, […]
Harvest Moon Triathlon
Est. in 2000 this Colorado classic provides the veterans to beginners a challenging, affordable, and competitive race with a local flavor. Whether this is your first event of the season, or a tune-up for a summer long course triathlon, don't miss the Harvest Moon! The Aquabike portion is one of the fastest growing Aquabikes in […]
Reuter-Hess Trail Run
10k, with 600′ of elevation gain, on the trails at the Reuter-Hess Incline and Reservoir, in Parker. After 1/3mi, you climb an incline/challenge hill. The rest of the course is on rolling terrain, a mix of fairly smooth and somewhat rocky. Enjoy great views across the panorama of the front range. Staggered starts (Dipsea style) […]
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