Event details subject to change. Please confirm all information via event website.
Gold Hill Classic
Nestled in the canyons of Boulder County, Colorado the Gold Hill Classic 30k launches runners into a thrilling mix of grit, grind, and gorgeous mountain views. Wind your way through soul-shaking climbs, fast-flowing descents, and high-altitude rollers. With every turn, the course serves up sweeping vistas, winding dirt roads, and that pure, untamed energy only found […]
Breckenridge Road Marathon
THE BRECKENRIDGE ROAD MARATHON IS JUST THAT... ONE-OF-A-KIND EXPERIENCE, WITH A LITTLE SOMETHING FOR EVERYONE! ARE YOU LOOKING FOR THAT BUCKET LIST RACE, A WEEKEND GET AWAY WITH FRIENDS, OR JUST A GREAT RUN IN THE MOUNTAINS... THEN THIS IS THE PERFECT RACE FOR YOU! THE BRECKENRIDGE ROAD MARATHON, HALF-MARATHON AND 10K WILL START ATOP […]
Boulder XC Series I
EVENTS 9:00AM 10 YEARS & UNDER - 1K 9:15AM 16 YEARS & UNDER - 3K (1 x 1K + 1 x 2K) 9:40AM OPEN - 5K (1 x 1K + 2 x 2K)
Lions Roar for Fitness 5K/2.5K
So What Is the Lions Roar for Fitness 5k/2.5K Challenge? 5K Challenge — Starts promptly at 9:00 a.m. at Lake Minnequa (near CIMS), but please arrive by 8:15 a.m. There will be a shot gun start. Medals will be awarded to all age group winners after the race. 2.5K Challenge – Starts promptly at 9:10 a.m. at […]
Kipling Villas 5K
This race will be throughout the trails in the Kipling Villas neighborhood near Lilley Gulch Recreation Center.
Saint’s Corp Pilgrimage Fun Run
Join us in Pagosa Springs as we come together to support programs that build confidence, leadership, and real-world skills in our younger generation through hands-on, meaningful experiences. At Saint’s Corp, we believe every child deserves the chance to grow, explore their potential, and feel supported along the way. This event helps make that vision a […]
Rise 5K
Get ready to lace up and show your Roadrunner pride at the Annual Roadrunners 5k—our favorite Homecoming tradition! Whether you’re a speedster, a stroller, or somewhere in between, everyone’s welcome to join this fun run, jog, or walk weaving through the beautiful Auraria Campus.
Rocky’s Backyard Ultra
Rocky's Backyard Ultra is a challenging Ultra Trail race hosted in beautiful Estes Park, Colorado. We strive to host a challenging event that is welcoming and motivating to all. "One More Lap" The Backyard Ultra is a form of Ultra Trail race where runners must complete 4.167 miles in less than one hour, every hour, until only one […]
Riverside Ramble
The Alliance and 7000ft Running Company present The Riverside Ramble! The Riverside Ramble is an accessible fun run that celebrates survivors in the outdoor community and emphasizes the necessity for safety in all spaces. Sexual violence is prevalent in outdoor recreation and the outdoor industry. According to a 2018 survey by Outside Magazine, 70% of […]
Canceled bRUNch Run 5K/10K
The bRUNch Run ™ is back! Join us in Denver for the most epic and delicious 5K + 10K run/walk. (There is also the 15K)! Think road race meets food festival... join us for a morning of cheering runners on, finish line high fives and hugs, tears of joy, the only race with a scented […]
EDT XC Showdown
Whether you run for a team, as an individual, or you just want to try out the experience of running a cross country race, you are welcome to join us for the 2024 Elevated XC Showdown! Boys/Girls will run in combined races, and will be separated by age groups below. All courses utilize the same […]
Boulder Skyline Traverse
The Boulder Skyline Traverse is a ~18 mile trail route that covers the 5 peaks of Boulder (South Boulder Peak, Bear Peak, Green Mountain, Flagstaff Mountain, and Mt. Sanitas). You'll gain roughly 5,600 ft of vert! The route is intermediate to advanced! All levels are welcome, but our shuttle service will be cut off at […]
Cowboy Half Marathon
With a new race date for 2021, the Mancos Cowboy Half Marathon and 5k is a beautiful and scenic course with a mix of pavement, dirt road, and trail. Grab a few friends and spend the weekend in the beautiful Mancos Valley. Due to COVID, initially this race is limited to only 175 people for […]
CSU Homecoming 5K
The Homecoming Race will take place on the Oval for our traditional course. All ages and abilities are welcome. Proceeds from the Homecoming Race benefit the ongoing research efforts and outreach engagements offered by the Department of Health and Exercise Science. HES is committed to a life-altering education for every one of our 1,400 undergraduate […]
Crazy Cloverleaf
We host one race per month from November to March. All races are at Chatfield State Park and start at 9:00 am on Saturday mornings. Check-in starts at 8:15 am.
Run Fur Fun Spooktacular 5K
Our Run Fur Fun 5k starts and ends at Odell Brewing Company in Fort Collins. Don't forget to wear a costume for the costume contest, enjoy the eclectic tunes of The Sugar Britches, and have lots of fun with fellow animal-and beer-loving racers. Members of NOCO Clown Club will be there making balloon animals for the youngsters […]
Canceled Run With The Panthers 8K
Come join us at 8,410' for a fun and fast 8,410meter road race! This is a fun and welcoming local race benefiting the Nederland Middle/Senior High School PTA. This is an out and back course from the high school to the historic townsite of Eldora and back, all along the Middle Boulder Creek. Watch out […]
IACP 5K Fun Run
Lace up and join us for the IACP 5K Fun Run at the 2025 International Association of Chiefs of Police Conference in Denver! This lighthearted, non-competitive run is your chance to kick off the day with fresh air, great views, and even better company. Whether you’re a seasoned runner or just in it for the […]
Crimson Classic 5K
The University of Denver's Annual Crimson Classic 5K Run/1.5 Mile Walk will take place on Carnegie Green Lawn. Music, stretching, and snacks will start at 2:15pm. The focus of the Crimson Classic is to celebrate wellness and to bring together our community. This is a free event! Please join us for a selection of wellness […]
Trick or Trot 5K
Join the Apex Park and Recreation District Foundation for the inaugural Trick or Trot 5K! Runners and walkers of all ages and abilities are all welcome to join us for this Halloween celebration. Dress in your Halloween best for a chance to win prizes for the costume contest. There will be a separate 1-mile Trick […]
Spooky Sprint 5K
Get ready to lace up your sneakers (or your costume!) for Almost Home’s first-ever Spooky Sprint 5K! Join us on Saturday, October 25, 2025 at Margaret Carpenter Park in Thornton for a morning full of fun, community spirit, and impact. Whether you’re running, walking, or choosing to “sleep in”, every registration helps Almost Home provide […]
YMCA Creepy Crawl 5K
Our annual "spooky themed" race starts at the Palmer Lake Regional Recreation Area. We head down the scenic Santa Fe Trail for a bit then turnaround and finish with a lap around Palmer Lake. This is sure to be a fun day for everyone! Our Kids Monster Dash Fun Run is for kids 12 and […]
Eerie Erie 5K/10K
The world-famous Eerie Erie is a Halloween-themed 5k and 10k race that runs through historic downtown Erie and takes advantage of our beautiful trail system that weaves along the Coal Creek open space areas. The 10k passes by scenic Pleasant Hill Cemetery with panoramic views and where friendly spirits can’t wait to visit this year’s […]
Halloween Fun Run
This Halloween, join us for a spooky 5k or 1 mile loop through the Pioneer Cemetery in Idaho Springs!! Try for a PR or take a leisurely stroll as you trick or treat with the ghouls in the graveyard. DON'T FORGET TO DRESS UP! Our Halloween costume contest gives you even more reason to rock […]
Canceled Redrum Fun Run
Get ready to lace up your running shoes and unleash your spooky spirit at the Redrum Costume Fun Run 2025! Join hundreds of ghosts, goblins, superheroes, and wacky characters as we dash through the heart of downtown Greeley in a festive 3K that’s more about fun than speed. This family-friendly event welcomes all ages and […]
Quick Draw @ McGraw Trail Race
Come one, come all! And join us in the "Quick Draw @ McGraw" 2 Mile Trail Run, organized and hosted by CRATES Colorado and benefitting McGraw Memorial Park. This challenging trail course located directly south of the Keystone Bridge located inside McGraw Park will give runners of all skill levels a true test of their […]
Team Hope 5K
The Rocky Mountain Chapter of the Huntington’s Disease Society of America (HDSA) will host the annual Heroes and Villains Team Hope Walk and 5K Run at Stapleton Central Park. Wear your favorite costume! All proceeds support HDSA’s mission to improve the lives of people affected by Huntington’s disease (HD) and their families.
Spooky Sprint 5K
This eerie evening race winds through a chilling course at the YMCA of Pueblo. The thrilling Halloween themed race is perfect for all ages and fitness levels. Recommended for those who want to have a hauntingly good PR. The best part of Spooky Sprint is you get to wear your costume! Whether you’re running as […]
The Stride 5K/10K
You’re invited to The Stride, a family-friendly 5K, 10K, Kids Fun Run, and Wellness Expo in Littleton on October 24th. Benefitting the Littleton Public Schools Foundation, this event brings together the community for a great cause.
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 […]
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