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Races in Colorado
130 Events
Endurance Races in Colorado
Trehko tracks 130 endurance events in Colorado, including 121 Running events, 1 Triathlon event, 3 Cycling events, 5 Trail Running events. Whether you're searching for your first 5K, a Boston qualifier marathon, a local triathlon, or a trail ultra, Colorado has a race for every athlete. Use Trehko to compare registration fees and deadlines side by side, save your target races, and get automated reminders before registration opens or closes. All races listed below link directly to their official registration pages.
All 130 Races in Colorado
11th Annual Log Hill Hustle — Ridgway, 5K 20th Annual Golden Gallop — Golden, 5K 22nd Annual Run Through Time Trail Marathon and Half Marathon — Salida, Half Marathon A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon All-Out Beat the Heat — Westminster, Half Marathon All-Out Dog Days — Westminster, Half Marathon All-Out Fa La La — Westminster, Half Marathon All-Out Fall Fest — Westminster, Half Marathon All-Out Kooky-Spooky — Golden, Half Marathon All-Out Mardi Crawl — Arvada, Half Marathon All-Out Polar Prowl — Arvada, Half Marathon All-Out Runapalooza — Arvada, Half Marathon All-Out Spring Fever — Golden, Half Marathon Apex Foundation Trick or Trot 5K & Halloween Hunt — Arvada, 5K Aspen Valley Marathon — Aspen, Marathon Audi Power of Four Trail Run — Aspen, 50K Audi Snowmass 50 Mountain Bike Race — Snowmass Village, 50 Mile Autumn Run — Buena Vista, Half Marathon Bagel Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Beulah Challenge and OverIt Series — Beulah, Half Marathon Black Squirrel Half Marathon — Bellvue, Half Marathon Blue Sky Trail Marathon & Half Marathon — Fort Collins, Half Marathon Bolder Boulder 10K — Boulder, 10K Bound for Boston Marathon & Half Marathon - Denver — Denver, Half Marathon Breckenridge RunFest — Breckenridge, Marathon Broomfield Turkey Day 5K/10K — Broomfield, 10K BRR All-Comers Summer Track & Field Series #2 — Boulder, 100 Mile BRR All-Comers Summer Track & Field Series #3 — Boulder, 100 Mile BRR All-Comers Summer Track & Field Series #4 — Boulder, 100 Mile BRR All-Comers Summer Track & Field Series #5 — Boulder, 100 Mile Byers Peak Stampede Half Marathon & 5K Run — Fraser, Half Marathon Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Colorado 13er (Half Marathon/10k/5k) — Louisville, Half Marathon Colorado Springs Marathon, Half, 5K, and Kids K — Colorado Springs, 5K Colorado Women's Classic - Westminster — Westminster, 5K Courage Classic Colorado — Frisco, Century Denver Colfax Marathon — Denver, Marathon Denver, CO Galloway Training Program — Denver, Marathon Denver: Walk With Autism and Resource Fair — Denver, 5K Durango Marathon — Durango, Marathon Eat. Run. Adopt. 10K — Berthoud, 10K Erie Half & 5k — Erie, Half Marathon Escalante Days 5K — Dolores, 5K Estes Epic — Estes Park, 50K Fall Equinox — Fort Collins, Half Marathon Feet for Justice Run — Denver, 10K FireKracker 5k — Fort Collins, 5K Fitness Expo On Tap at the Colorado Tap House — Arvada, 5K Golden Harvest Half Marathon & 5k/10k - Colorado Springs — Colorado Springs, Half Marathon Golden Harvest Half Marathon & 5k/10k - Denver — Westminster, Half Marathon Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile) — Larkspur, Road Race Greenland Trail Races — Larkspur, 50K Hahns Peak Vertical Trail Race — Clark, Road Race Halloween Hustle for Charity — Glenwood Springs, 5K Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Hardrock 100 — Silverton, 100 Miles Hardrock 100 — Silverton, 100 Miles Heatwave Half Marathon - Colorado Springs — Colorado Springs, Half Marathon Heatwave Half Marathon - Denver — Littleton, Half Marathon High Lonesome 100 — Nathrop, 100 Mile HRCA Backcountry Wilderness Half Marathon — Lone Tree, Half Marathon Ironman 70.3 Boulder — Boulder, Ironman 70.3 Jog in the Bog 5k — Westminster, 5K July 4th Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Labor Day Half Marathon — Parker, Half Marathon Leadville Trail 100 — Leadville, 100 Miles Leadville Trail 100 MTB — Leadville, 100 Miles Leadville Trail 100 Run — Leadville, 100 Miles Lucky Brew Race 5K, 10K, 15k & Half Marathon — Severance, Half Marathon Mesa County Search & Rescue 5K — Fruita, 5K Miles 4 Madison 5K & 1K — Littleton, 5K MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon NCMC Turkey Trot — Greeley, 5K Never Summer 100km & 60km — Walden, 100K New Year's Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon NoCo Urban Ultra & Relay — Bellvue, 50 Mile Oktoberfest Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Ouray 100 — Ouray, 100 Miles PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Pelican Lakes Turkey Trot — Windsor, 5K Pikes Peak Marathon — Manitou Springs, Marathon Pioneer Prairie Dog Half, 10k & 5k — Westminster, Half Marathon Platte River Half-Marathon, Relay & 5k — Littleton, Half Marathon PRA Miner Gold Rush — Broomfield, 5K Pueblo's Firecracker 5k! — Pueblo, 5K Quad Rock 50 — Fort Collins, 50 Miles Rampart Rager Gravel — Colorado Springs, 50K Red Feather Trail Jamboree — Red Feather Lakes, 50 Mile Rendezvous Run for Independence — Winter Park, 5K Resolution Run - Fort Collins — Fort Collins, 5K RexRun For PAWSitivity 2026 Trail Run/Walk — Aurora, 5K Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon — Canon City, Half Marathon RMRR Fall Marathon Training Series — Thornton, Marathon RMRR Fall Marathon Training Series #2 — Thornton, Marathon RMRR Fall Marathon Training Series #3 — Thornton, Marathon Rock Canyon Half Marathon- 40th Anniversary Run! — Pueblo, Half Marathon Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Run for Chocolate 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Run for Coffee Lovers 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Run for Donuts 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Run for Mental Health 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Run for PB& J 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Run Rabbit Run 100 — Steamboat Springs, 100 Miles Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado — Boulder, Half Marathon Sawatch Ascent — Nathrop, 50K SBT GRVL — Steamboat Springs, Gravel Sheep Mountain Trail Runs — Fairplay, Half Marathon Slacker Half Marathon-Relay-4-Mile Races — Georgetown, Half Marathon Sloth Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Staunton Rocks! Marathon and Half Marathon — Pine, Half Marathon Suffer Better 10th Annual Fall Trail Runs — Pine, 50K Summer Splash Prairie Dog Half, 10k, & 5k — Castle Rock, Half Marathon Sunrise Marathon 5K/10K/13.1 DENVER/AURORA — Centennial, Marathon Sunrise Stampede — Longmont, 5K TBK Bank Thirsty 13 Half Marathon — Durango, Half Marathon Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon The Colorado Marathon — Fort Collins, Marathon The Long View Marathon — Fort Collins, Marathon The Palmer Lake .5K (Yes "Point" 5) — Palmer Lake, 5K The Sunlight Showdown — Glenwood Springs, 5K The Toyota Super Half Marathon™& Game Day 5K™ — Colorado Springs, Half Marathon Trail Sisters Women's Half Marathon & 10k — Buena Vista, Half Marathon TURKEY TREK (13.1, 10k, 5k & 2k) — Arvada, Half Marathon Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Weld Your Mettle Running Festival — Eaton, 50 Mile West Line Winder — Buena Vista, 50K Westy Half & 5k — Westminster, Half Marathon Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run — Windsor, Half Marathon YMCA of Pueblo Spooky Sprint 5K — Pueblo, 5K
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