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Races in Colorado
84 Events
Endurance Races in Colorado
Trehko tracks 84 endurance events in Colorado, including 82 Running events, 1 Trail Running event, 1 Triathlon event. 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 84 Races in Colorado
2026 Loveland Turkey Trot — Loveland, Road Race 20th Annual Golden Gallop — Golden, 5K 22nd Annual Run Through Time Trail Marathon and Half Marathon — Salida, Half Marathon 25th Annual Black Canyon Triathlon — Montrose, Sprint Tri A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon All-Out Beat the Heat — 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 Spring Fever — Golden, Half Marathon Apex Foundation Trick or Trot 5K & Halloween Hunt — Arvada, 5K Autumn Run — Buena Vista, 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 Breckenridge RunFest — Breckenridge, Marathon Broomfield Turkey Day 5K/10K — Broomfield, 10K Christmas Mountain 5 Mile Run — Salida, Road Race Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA — Centennial, 5K/10K/13.1 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 Denver Colfax Marathon — Denver, Marathon Denver: Walk With Autism and Resource Fair — Denver, 5K Durango Marathon — Durango, Marathon Estes Epic — Estes Park, 50K Fall Equinox — Fort Collins, Half Marathon FAMpoint5k — Grand Junction, 5K Feet for Justice Run — Denver, 10K Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile) — Larkspur, Road Race Greenland Trail Races — Larkspur, 50K Halloween Hustle for Charity — Glenwood Springs, 5K Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon HRCA Backcountry Wilderness Half Marathon — Lone Tree, Half Marathon James Test Site — Lyons, 5K KowTown Gravel — Kremmling, Gravel Labor Day Half Marathon — Parker, Half Marathon 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 New Year's Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon NoCo Urban Ultra & Relay — Bellvue, 50 Mile NoCo Urban Ultra & Relay — Bellvue, Relay Oktoberfest Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon OUTLAST COLORADO SPRINGS — Colorado Springs, Road Race OUTLAST DENVER — Littleton, Road Race PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA — Centennial, Half Marathon Pelican Lakes Turkey Trot — Windsor, 5K Platte River Half-Marathon, Relay & 5k — Littleton, Half Marathon PRA Miner Gold Rush — Broomfield, 5K Rampart Rager Gravel — Colorado Springs, 50K Red Feather Trail Jamboree — Red Feather Lakes, 50 Mile Resolution Run - Fort Collins — Fort Collins, 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 #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, 5K/10K/13.1 Run for Donuts 5K/10K/13.1 DENVER/AURORA — Centennial, 5K/10K/13.1 Run for Mental Health 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 Suffer Better 10th Annual Fall Trail Runs — Pine, 50K Sunrise Marathon 5K/10K/13.1 DENVER/AURORA — Centennial, 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 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 Weld Your Mettle Running Festival — Eaton, Relay 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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