Event details subject to change. Please confirm all information via event website.
Indian Creek Fifties
The Indian Creek Fifties takes advantage of the challenging and little used terrain just southwest of the Denver Metro area. Loop 1 climbs to 8000′, and quickly flows down into […]
Bobcat Trail Races
Bobcat Trail Race was created to feature one of Colorado Spring’s best city parks, Palmer Park. Runners will enjoy views of the city and Pikes Peak from the rocky bluffs. […]
Blue Sky Trail Marathon
Taking place on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, the Blue Sky courses take you on a north-south tour of the easternmost hogbacks of […]
Living Water 5K
5K Fun Run race and family friendly 1mile run/walk to help support communities who are in dire need of clean, sustainable water solutions and those suffering from recent disasters. The […]
Sean May Memorial Run
The run/walk is held to honor Sean May, a Chief Deputy District Attorney with the 17th Judicial District Attorney’s Office who was murdered in his backyard in 2008 when he […]
Great Pumpkin Haul
The Great Pumpkin Haul involves strength, agility and hauling a pumpkin on a 2 mile cross country course. Before the "Haul" you will pick out a pumpkin from the pumpkin […]
Great Trailhead Foot Race
Welcome to the Great Trailhead Foot Race at Bear Creek Lake Park! Featuring legitimate TRAILS in the shadow of Denver's skyline, you'll love the single-track and dirt as you race […]
Trail Apples
Chatfield State Park 11500 N. Roxborough Park Rd, Littleton, CO, United StatesWe 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.
CDDR 5K Run to Rescue
The Colorado Domestic Duck Rescue 5k Run to Rescue is a untimed fun run or walk to support the rescue and homing of domestic ducks dumped by their owners into […]
PPRR Fall Series II
North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United StatesThe Fall Series consists of four trail races in four different city/county parks. The trails range from well-maintained to rocky with tree roots. Each event is a unique challenge at […]
Avery Fall 5K
Avery Brewing Company 4910 Nautilus Ct N, Boulder, CO, United StatesJoin us for The Avery Fall 5k @ Avery Brewing on October 18, 2026, for a 5k event that starts and ends at this awesome taproom in Boulder. Run, walk, […]
Palmer Lake .5K (Yes “Point” 5)
The Fastest Growing (and shortest) Running Event in CO is back!!! Awake the Lake will hold its 8th Annual PALMER LAKE .5K (Yes “Point” 5), and it just keeps getting […]
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 […]
Canyonlands Ultra
Canyonlands 100K, 50 Mile, 50K, Marathon, Half Marathon, and 15K Canyonlands Ultra starts and finishes at the Behind the Rocks Trail, along the border of the Behind the Rocks Wilderness Study […]
Bridge Runner Ultra
Discover the scenic 35-mile loop starting in Canon City, Colorado, tracing along the Arkansas River and through historic Tunnel Drive tunnels. Ascend to 7,109 feet for panoramic views of Royal […]
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 […]
Race to Cure Sarcoma 5K
The Race to Cure Sarcoma (RTCS) is the premier run/walk series in the United States, focused on raising awareness, providing education, and research funds for sarcoma. Each year, the Sarcoma Foundation of […]
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 […]
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 […]
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 […]
MonsterDASH
Colorado's Favorite Halloween Runs....Each year the Theme Changes!! This festival on Sloan's Lake, brings scary music, tons of Blow Ups, Carnival Games and Scary Clowns. The 5k and 10k run […]
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 […]
Hoofin’ It Through the Hollows 5K
deKoevend Park 6315 S. University Blvd., Centennial, CO, United StatesRunners of all ages and abilities, families, and dogs are all welcome to join us for this Halloween celebration! Dress in your Halloween best for a chance to win prizes […]
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.
Beware the Bear Trail Races
Run the original Bear Creek Lake Park trail race - the Beware the Bear Trail Races - on October 17th. This trail race consists of a 14.2K or a 5K. Or do them both with the double! There is also a kids 1K.
Ghosts & Goblins 5K/10K
The Ghosts & Goblins 5K/10K is a family, friendly event to celebrate the upcoming holiday season. Start your holiday traditions with a fun morning of fitness and friends by joining […]
Odyssey Odyssey 5K
The Odyssey Odyssey Fun Run is entering its 9th year. It has always been centered around having fun and exercising our bodies. It is an all-inclusive event, which is why […]
MonsterDASH
Colorado's Longest running Halloween race....since 2006, we have changed the THEME to this race year after year! We wil have scary music and a CIRCUS Themes Expo at the start/finish. […]
Narrowleaf Lake Run
Brisk autumn running in Colorado – OH YEA! Join us for a family fun event with three distance options at the beautiful Boyd Lake State Park venue. What’s a “Narrowleaf” […]
Spooky Sprint Half Marathon
Join us for the annual Spooky Sprint 5k/10k & Half Marathon! A fun, Halloween-themed event that is perfect for the whole family.
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.