# Running Races in Colorado (2026)

> 353 upcoming running races across Colorado — 5Ks, 10Ks, half marathons, marathons and ultras.

- **Page:** https://runthis.run/races/colorado

## Races

- **[18th Annual Be Ovary Aware 5k run 3k walk](https://runthis.run/event/rr-129913-18th-annual-be-ovary-aware-5k-run-3k-walk)** — Sun, Sep 20, 2026 · 8:30 AM MDT · Colorado Springs, CO · 5K / 1.9 mi
- **[RunDenver Series 2026-27](https://runthis.run/event/rr-139875-rundenver-series-2026-27)** — Sun, Dec 6, 2026 · 9:00 AM MST · Denver, CO · 5K / 10K / Marathon
- **[Rudolph Ramble 5K Run/Walk](https://runthis.run/event/rr-139876-rudolph-ramble-5k-run-walk)** — Sun, Dec 6, 2026 · 9:00 AM MST · Denver, CO · 5K
- **[Polar Bear 5K](https://runthis.run/event/rr-139877-polar-bear-5k)** — Sun, Jan 17, 2027 · 9:00 AM MST · Denver, CO
- **[Super Bowl 5K](https://runthis.run/event/rr-139878-super-bowl-5k)** — Sun, Feb 7, 2027 · 9:00 AM MST · Denver, CO
- **[Valentine's Day 4M](https://runthis.run/event/rr-139879-valentines-day-4m)** — Sun, Feb 14, 2027 · 9:00 AM MST · Denver, CO
- **[That Dam Run 13.1, 10K, 5K](https://runthis.run/event/rr-139880-that-dam-run-13-1-10k-5k)** — Sun, Mar 7, 2027 · 8:00 AM MST · Arapahoe County, CO · 5K / 10K / 13 m
- **[20th Annual Golden Gallop](https://runthis.run/event/rs-105394-20th-annual-golden-gallop)** — Sun, Sep 20, 2026 · 12:00 AM UTC · Golden, CO · 5K / 10K / 12.4 mi
- **[Expo Park XC Runs](https://runthis.run/event/rs-134356-expo-park-xc-runs)** — Sun, Sep 20, 2026 · 12:00 AM UTC · Aurora, CO · 5K / 1.2 mi / 1.9 mi / 2.5 mi
- **[Fall Equinox](https://runthis.run/event/rs-157755-fall-equinox)** — Sun, Sep 20, 2026 · 12:00 AM UTC · Fort Collins, CO · Marathon / 5.0 mi
- **[Chile & Frijole Hot to Trot 5K & 10K](https://runthis.run/event/rs-204249-chile-frijole-hot-to-trot-5k-10k)** — Sun, Sep 20, 2026 · 12:00 AM UTC · Pueblo, CO · 5K / 10K
- **[Connection 5k](https://runthis.run/event/rs-211365-connection-5k)** — Sun, Sep 20, 2026 · 12:00 AM UTC · CARBONDALE, CO · 5K
- **[Pikes Peak Marathon](https://runthis.run/event/rs-67238-pikes-peak-marathon)** — Sun, Sep 20, 2026 · 12:00 AM UTC · Manitou Springs, CO · Marathon
- **[Farmers 5000](https://runthis.run/event/rs-95088-farmers-5000)** — Sun, Sep 20, 2026 · 12:00 AM UTC · Wheat Ridge, CO · 5K
- **[Mountain Lions XC Program](https://runthis.run/event/rs-146100-mountain-lions-xc-program)** — Mon, Sep 21, 2026 · 12:00 AM UTC · Boulder, CO
- **[Nutrition for Women who Mountain Bike - with Audra Holck!](https://runthis.run/event/rs-206369-nutrition-for-women-who-mountain-bike-with-audra-holck)** — Tue, Sep 22, 2026 · 12:00 AM UTC · Colorado Springs, CO
- **[CG Adventure Club - Elevation Everest](https://runthis.run/event/rs-198665-cg-adventure-club-elevation-everest)** — Wed, Sep 23, 2026 · 12:00 AM UTC · Winter Park, CO · 22.0 mi / 42.0 mi
- **[NW Open Spaces 5k XC PR Challenge](https://runthis.run/event/rs-101511-nw-open-spaces-5k-xc-pr-challenge)** — Fri, Sep 25, 2026 · 12:00 AM UTC · Northglenn, CO · 5K
- **[Red Feather Trail Jamboree](https://runthis.run/event/rs-175348-red-feather-trail-jamboree)** — Fri, Sep 25, 2026 · 12:00 AM UTC · Red Feather Lakes, CO · 50.0 mi / 31.1 mi / Marathon / 94.0 mi
- **[2026 Skate for Chicken](https://runthis.run/event/rs-187412-2026-skate-for-chicken)** — Fri, Sep 25, 2026 · 12:00 AM UTC · Colorado Springs, CO
- **[Boggy Draw Bear Chase](https://runthis.run/event/rs-79994-boggy-draw-bear-chase)** — Fri, Sep 25, 2026 · 12:00 AM UTC · Dolores, CO · 1.9 mi / 5K
- **[West Line Winder](https://runthis.run/event/rs-106927-west-line-winder)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Buena Vista, CO · 31.1 mi / 18.6 mi
- **[Bayfield Heritage Days 5k](https://runthis.run/event/rs-115701-bayfield-heritage-days-5k)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Bayfield, CO · 5K
- **[HRCA Oktoberfest 5K](https://runthis.run/event/rs-122683-hrca-oktoberfest-5k)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Littleton, CO · 5K
- **[Mountains to the Desert Classic](https://runthis.run/event/rs-143126-mountains-to-the-desert-classic)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Telluride, CO · 103.0 mi / 73.0 mi / 110.0 mi
- **[25th Annual Black Canyon Triathlon](https://runthis.run/event/rs-143542-25th-annual-black-canyon-triathlon)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Montrose, CO · 5K
- **[Denver Rotary Club Cycling to Serve 2026](https://runthis.run/event/rs-144386-denver-rotary-club-cycling-to-serve-2026)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Denver, CO
- **[Mesa County Search & Rescue 5K](https://runthis.run/event/rs-150726-mesa-county-search-rescue-5k)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Fruita, CO · 5K
- **[NIGHT NATION RUN - DENVER](https://runthis.run/event/rs-15463-night-nation-run-denver)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Commerce City, CO · 5K
- **[Crested Butte Ultra](https://runthis.run/event/rs-170946-crested-butte-ultra)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Crested Butte, CO · 50.0 mi / 34.2 mi / 21.7 mi
- **[Estes Epic](https://runthis.run/event/rs-180837-estes-epic)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Estes Park, CO · 31.0 mi / 15.0 mi / 62.0 mi
- **[Pagosa Mountain Chile Cha Cha Trail Races](https://runthis.run/event/rs-189074-pagosa-mountain-chile-cha-cha-trail-races)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Pagosa Springs, CO · 5K / 10K
- **[Oktoberfest Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-199674-oktoberfest-run-5k-10k-13-1-denver-aurora)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Run for Donuts 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-200082-run-for-donuts-5k-10k-13-1-denver-aurora)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[OUTLAST COLORADO SPRINGS](https://runthis.run/event/rs-205968-outlast-colorado-springs)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Colorado Springs, CO · 18.0 mi
- **[Run For Your Flapjacks 5K](https://runthis.run/event/rs-208788-run-for-your-flapjacks-5k)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Oak Creek, CO · 5K
- **[Mountain Marmot Trail Run presented by Durango Running Company](https://runthis.run/event/rs-33814-mountain-marmot-trail-run-presented-by-durango-running-compa)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Durango, CO · 12.0 mi
- **[McGinn Memorial Cross Country Challenge](https://runthis.run/event/rs-39431-mcginn-memorial-cross-country-challenge)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Pagosa Springs, CO · 1.9 mi / 5K
- **[Runway 5K - Run for the Angels](https://runthis.run/event/rs-50063-runway-5k-run-for-the-angels)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Broomfield, CO · 5K
- **[Lisa Nelson’s Mustang Stampede 5K](https://runthis.run/event/rs-51194-lisa-nelson-s-mustang-stampede-5k)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Arvada, CO · 5K
- **[Parker Parks and Recreation So Long to Summer 5K/10K](https://runthis.run/event/rs-95482-parker-parks-and-recreation-so-long-to-summer-5k-10k)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Parker, CO · 5K / 10K
- **[Sangre de Cristo Trail Festival](https://runthis.run/event/rs-98116-sangre-de-cristo-trail-festival)** — Sat, Sep 26, 2026 · 12:00 AM UTC · Westcliffe, CO · 8.0 mi / 16.8 mi / 31.1 mi / 50.0 mi / 62.1 mi / 104.0 mi
- **[Sawatch Ascent](https://runthis.run/event/rs-107097-sawatch-ascent)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Nathrop, CO · 31.1 mi
- **[Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile)](https://runthis.run/event/rs-123189-greenland-open-space-pack-burro-race-presented-by-double-rai)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Larkspur, CO · 8.0 mi / 3.0 mi
- **[WWE ANNUAL RUN WITH THE WOLVES](https://runthis.run/event/rs-129549-wwe-annual-run-with-the-wolves)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Arvada, CO · 5K / 1000 m
- **[14er Fest 14K & 5K](https://runthis.run/event/rs-131319-14er-fest-14k-5k)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Buena Vista, CO · 8.7 mi / 5K
- **[RMRR Fall Marathon Training Series #3](https://runthis.run/event/rs-150896-rmrr-fall-marathon-training-series-3)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Thornton, CO · 10.0 mi / 20.0 mi
- **[Grand Valley Brew Runs](https://runthis.run/event/rs-166951-grand-valley-brew-runs)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Grand Junction, CO · 5K
- **[Joy & Justice 5k](https://runthis.run/event/rs-170020-joy-justice-5k)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Timnath, CO · 5K / 1 mile
- **[Pat Mahan Memorial Foundation 5K](https://runthis.run/event/rs-186476-pat-mahan-memorial-foundation-5k)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Wiggins, CO · 5K
- **[Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado](https://runthis.run/event/rs-205779-running-for-childrens-rights-to-both-parents-9-of-50-half-ma)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Boulder, CO · Marathon / 5K / 10K
- **[Girls on the Run Rockies Boulderthon SoleMates 2026](https://runthis.run/event/rs-211392-girls-on-the-run-rockies-boulderthon-solemates-2026)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Boulder, CO · Marathon / 10K
- **[Healthy Kids Running Series Fall 2026 - La Junta, CO](https://runthis.run/event/rs-211605-healthy-kids-running-series-fall-2026-la-junta-co)** — Sun, Sep 27, 2026 · 12:00 AM UTC · La Junta, CO · 4.0 mi / 2.0 mi / 1 mile
- **[Colorado Coyotes Youth XC Invitational](https://runthis.run/event/rs-50149-colorado-coyotes-youth-xc-invitational)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Cenennial, CO · 1.2 mi / 1.9 mi / 2.5 mi
- **[Flyin' Lion 5K](https://runthis.run/event/rs-95801-flyin-lion-5k)** — Sun, Sep 27, 2026 · 12:00 AM UTC · Littleton, CO · 5K
- **[Segment Traildown](https://runthis.run/event/rs-191226-segment-traildown)** — Thu, Oct 1, 2026 · 12:00 AM UTC · Fort Collins, CO
- **[Water For People World Water Classic](https://runthis.run/event/rs-94683-water-for-people-world-water-classic)** — Fri, Oct 2, 2026 · 12:00 AM UTC · Anywhere, CO · 3.7 mi / 37.3 mi
- **[Mustang Music 5K](https://runthis.run/event/rs-116902-mustang-music-5k)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Fort Collins, CO · 5K / 1 mile
- **[HRCA Wildcat Mountain Trail Races](https://runthis.run/event/rs-122682-hrca-wildcat-mountain-trail-races)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Littleton, CO · 10.0 mi / 10K
- **[Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon](https://runthis.run/event/rs-124509-rim-to-rim-royal-gorge-races-5k-road-run-trail-8-mile-trail-)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Canon City, CO · 5K / 8.0 mi / Marathon / 10K
- **[Homecoming 5K at Colorado State University](https://runthis.run/event/rs-133569-homecoming-5k-at-colorado-state-university)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Fort Collins, CO · 5K
- **[Splashland Triathlon](https://runthis.run/event/rs-143541-splashland-triathlon)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Alamosa, CO
- **[Spooky Sprint - Denver](https://runthis.run/event/rs-153154-spooky-sprint-denver)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Littleton, CO · 50 m / 1 mile / 5K / 10K / Marathon
- **[Lafayette Music Fest -5K - 10K](https://runthis.run/event/rs-195431-lafayette-music-fest-5k-10k)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Lafayette, CO · 10K / 5K
- **[OUTLAST DENVER](https://runthis.run/event/rs-208190-outlast-denver)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Littleton, CO · 18.0 mi
- **[Ethiorado 5K Run/Walk](https://runthis.run/event/rs-212044-ethiorado-5k-run-walk)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Aurora, CO · 5K
- **[Family Soccer 5k run](https://runthis.run/event/rs-213784-family-soccer-5k-run)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Aurora, CO · 3.0 mi
- **[Ethiopians 5K](https://runthis.run/event/rs-214181-ethiopians-5k)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Aurora, CO · 5K
- **[FAMpoint5k](https://runthis.run/event/rs-64043-fampoint5k)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Grand Junction, CO · 500 m
- **[Rainbow Trail Lutheran Camp's 20th Annual Grace Race 5k](https://runthis.run/event/rs-66045-rainbow-trail-lutheran-camps-20th-annual-grace-race-5k)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Denver, CO · 5K
- **[Big Waves Family Superhero 5K run/walk](https://runthis.run/event/rs-77880-big-waves-family-superhero-5k-run-walk)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Westminster, CO · 5K
- **[I Can 5k](https://runthis.run/event/rs-79095-i-can-5k)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Thornton, CO · 5K
- **[PRA Miner Gold Rush](https://runthis.run/event/rs-79441-pra-miner-gold-rush)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Broomfield, CO · 5K / 1 mile
- **[Emerald Mountain Trail Run](https://runthis.run/event/rs-83965-emerald-mountain-trail-run)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Steamboat Springs, CO · 7.5 mi / 4.0 mi
- **[Colorado Springs Marathon, Half, 5K, and Kids K](https://runthis.run/event/rs-95592-colorado-springs-marathon-half-5k-and-kids-k)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Colorado Springs, CO · Marathon / 5K / 1000 m
- **[Nielson Challenge](https://runthis.run/event/rs-96323-nielson-challenge)** — Sat, Oct 3, 2026 · 12:00 AM UTC · Colorado Springs, CO · 2.0 mi
- **[RMRR October 5k/8mi](https://runthis.run/event/rs-100124-rmrr-october-5k-8mi)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Aurora, CO · 8.0 mi / 5K
- **[Strides for Sierra 5K run/walk](https://runthis.run/event/rs-117605-strides-for-sierra-5k-run-walk)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Arvada, CO · 5K / 1000 m
- **[Liberty Energy 5K - Benefiting the Bettering Human Lives Foundation](https://runthis.run/event/rs-163922-liberty-energy-5k-benefiting-the-bettering-human-lives-found)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Denver, CO · 5K / 1000 m
- **[Rubey Rescue Run](https://runthis.run/event/rs-179891-rubey-rescue-run)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Aspen, CO · 3.5 mi / 1 mile
- **[OTILLO Swimrun Colorado](https://runthis.run/event/rs-181530-otillo-swimrun-colorado)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Fort Collins, CO
- **[Rolland Moore Park T&H 4K](https://runthis.run/event/rs-214905-rolland-moore-park-t-h-4k)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Fort Collins, CO · 2.5 mi
- **[Kids' Fall Series - Where Kids Run Free!](https://runthis.run/event/rs-36734-kids-fall-series-where-kids-run-free)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Colorado Springs, CO
- **[Fall Series - Get Dirty! Get Muddy!](https://runthis.run/event/rs-36739-fall-series-get-dirty-get-muddy)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Colorado Springs, CO · 3.8 mi / 4.0 mi / 5.4 mi / 7.3 mi
- **[Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run](https://runthis.run/event/rs-84571-windsor-marathon-half-marathon-10k-5k-1-mile-run)** — Sun, Oct 4, 2026 · 12:00 AM UTC · Windsor, CO · Marathon / 10K / 5K / 1 mile
- **[Fall Foliage Fun Run](https://runthis.run/event/rs-215203-fall-foliage-fun-run)** — Wed, Oct 7, 2026 · 12:00 AM UTC · Salida, CO · 5K
- **[The Roaring Fork Splash for Cash, a fundraiser for the Aspen Swim Club](https://runthis.run/event/rs-151668-the-roaring-fork-splash-for-cash-a-fundraiser-for-the-aspen-)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Aspen, CO · 200 m
- **[Dialysis Dash 5K- Canceled](https://runthis.run/event/rs-157517-dialysis-dash-5k-canceled)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Grand Junction, CO · 5K
- **[Manitou 5K](https://runthis.run/event/rs-163854-manitou-5k)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Manitou Springs, CO · 5K
- **[Kipling Villas 5K - 2026](https://runthis.run/event/rs-167844-kipling-villas-5k-2026)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Littleton, CO · 5K
- **[Breckenridge RunFest](https://runthis.run/event/rs-178572-breckenridge-runfest)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Breckenridge, CO · Marathon / 10K / 5K / 1 mile
- **[Footsteps for Families 5k Fun Run & Concert](https://runthis.run/event/rs-182412-footsteps-for-families-5k-fun-run-concert)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Windsor, CO · 5K
- **[Cookie Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-201389-cookie-run-5k-10k-13-1-denver-aurora)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-201512-coffee-lovers-run-5k-10k-13-1-denver-aurora)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Faith & Blue 5K](https://runthis.run/event/rs-213970-faith-blue-5k)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Fort Morgan, CO · 5K
- **[ASDAsh 5K to Beat Tooth Decay](https://runthis.run/event/rs-214019-asdash-5k-to-beat-tooth-decay)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Aurora, CO · 5K
- **[Cerox Championships](https://runthis.run/event/rs-214711-cerox-championships)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Frederick, CO
- **[Natalie R Color Run Test](https://runthis.run/event/rs-215405-natalie-r-color-run-test)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Evergreen, CO
- **[Lions Roar for Fitness 5k/2.5k Challenge](https://runthis.run/event/rs-49564-lions-roar-for-fitness-5k-2-5k-challenge)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Pueblo, CO · 5K / 1.6 mi
- **[The Long View Marathon](https://runthis.run/event/rs-72759-the-long-view-marathon)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Fort Collins, CO · Marathon / 5K
- **[Suffer Better 10th Annual Fall Trail Runs](https://runthis.run/event/rs-77745-suffer-better-10th-annual-fall-trail-runs)** — Sat, Oct 10, 2026 · 12:00 AM UTC · Pine, CO · 31.1 mi / 15.5 mi / 5K
- **[Westy Half & 5k](https://runthis.run/event/rs-15288-westy-half-5k)** — Sun, Oct 11, 2026 · 12:00 AM UTC · Westminster, CO · Marathon / 5K
- **[EDT XC Showdown](https://runthis.run/event/rs-165420-edt-xc-showdown)** — Sun, Oct 11, 2026 · 12:00 AM UTC · Aurora, CO · 1.9 mi / 2.5 mi / 1.2 mi
- **[Durango Marathon](https://runthis.run/event/rs-197219-durango-marathon)** — Sun, Oct 11, 2026 · 12:00 AM UTC · Durango, CO · Marathon
- **[The Moony Pride 5k](https://runthis.run/event/rs-208619-the-moony-pride-5k)** — Sun, Oct 11, 2026 · 12:00 AM UTC · Fort Collins, CO · 5K
- **[Your Story Isn't Over 5k/10k/Kids 1-Mile](https://runthis.run/event/rs-210192-your-story-isnt-over-5k-10k-kids-1-mile)** — Sun, Oct 11, 2026 · 12:00 AM UTC · Littleton, CO · 1 mile / 10K / 5K
- **[Kitty Beanz Cat 5k](https://runthis.run/event/rs-213274-kitty-beanz-cat-5k)** — Sun, Oct 11, 2026 · 12:00 AM UTC · Aurora, CO · 5K
- **[Whistle Pig Invitational](https://runthis.run/event/rs-154762-whistle-pig-invitational)** — Fri, Oct 16, 2026 · 12:00 AM UTC · Craig, CO · 5K
- **[Blue Sky Trail Marathon & Half Marathon](https://runthis.run/event/rs-175360-blue-sky-trail-marathon-half-marathon)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Fort Collins, CO · 26.7 mi / 13.8 mi
- **[Beti Bike Bash](https://runthis.run/event/rs-180977-beti-bike-bash)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Elbert, CO · 10.0 mi / 3.0 mi / 4.5 mi
- **[Witch Paddle](https://runthis.run/event/rs-203278-witch-paddle)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Littleton, CO
- **[Hyrox Sim](https://runthis.run/event/rs-207280-hyrox-sim)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Frederick, CO
- **[Living Water 5K and Family Fun Walk/Jog](https://runthis.run/event/rs-208385-living-water-5k-and-family-fun-walk-jog)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Denver, CO · 5K / 1 mile
- **[The Great Pumpkin Haul](https://runthis.run/event/rs-209754-the-great-pumpkin-haul)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Fruita, CO · 2.0 mi
- **[Chili Chase](https://runthis.run/event/rs-211772-chili-chase)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Durango, CO · 6.5 mi
- **[A2A Hero Run/Walk 5K](https://runthis.run/event/rs-212528-a2a-hero-run-walk-5k)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Pueblo, CO · 3.0 mi
- **[Running Scared 5K/13K - Denver](https://runthis.run/event/rs-212568-running-scared-5k-13k-denver)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Littleton, CO · 5K / 8.1 mi / 11.2 mi
- **[Longmonster Dash 5k](https://runthis.run/event/rs-213466-longmonster-dash-5k)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Longmont, CO · 5K
- **[The Great Trailhead Foot Race 5 & 10 Miler](https://runthis.run/event/rs-63766-the-great-trailhead-foot-race-5-10-miler)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Lakewood, CO · 5.0 mi / 10.0 mi
- **[Indian Creek Trail Runs](https://runthis.run/event/rs-98111-indian-creek-trail-runs)** — Sat, Oct 17, 2026 · 12:00 AM UTC · Sedalia, CO · 5.5 mi / 15.0 mi / 35.0 mi / 54.0 mi
- **[Halloween Hustle for Charity](https://runthis.run/event/rs-208499-halloween-hustle-for-charity)** — Sun, Oct 18, 2026 · 12:00 AM UTC · Glenwood Springs, CO · 1500 m / 3.4 mi
- **[Running Scared 5K/13K - Colorado Springs](https://runthis.run/event/rs-212573-running-scared-5k-13k-colorado-springs)** — Sun, Oct 18, 2026 · 12:00 AM UTC · Colorado Springs, CO · 5K / 8.1 mi / 11.2 mi
- **[Fall Harvest Kids Duathlon](https://runthis.run/event/rs-213631-fall-harvest-kids-duathlon)** — Sun, Oct 18, 2026 · 12:00 AM UTC · Colorado Springs, CO
- **[The KEG Enduro](https://runthis.run/event/rs-213715-the-keg-enduro)** — Sun, Oct 18, 2026 · 12:00 AM UTC · Idaho Springs, CO · 6.0 mi
- **[The Palmer Lake .5K (Yes "Point" 5)](https://runthis.run/event/rs-64025-the-palmer-lake-5k-yes-point-5)** — Sun, Oct 18, 2026 · 12:00 AM UTC · Palmer Lake, CO · 5K
- **[DU Crimson Classic 5K Run/1.5 Mile Walk](https://runthis.run/event/rs-168775-du-crimson-classic-5k-run-1-5-mile-walk)** — Wed, Oct 21, 2026 · 12:00 AM UTC · Denver, CO · 5K / 1.5 mi
- **[Apex Foundation Trick or Trot 5K & Halloween Hunt Powered by REP Fitness](https://runthis.run/event/rs-117155-apex-foundation-trick-or-trot-5k-halloween-hunt-powered-by-r)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Arvada, CO · 5K / 1 mile
- **[YMCA of Pueblo Race Series](https://runthis.run/event/rs-163951-ymca-of-pueblo-race-series)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Pueblo, CO · 5K
- **[YMCA of Pueblo Spooky Sprint 5K](https://runthis.run/event/rs-168272-ymca-of-pueblo-spooky-sprint-5k)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Pueblo, CO · 5K
- **[Race to Cure Sarcoma Denver](https://runthis.run/event/rs-180151-race-to-cure-sarcoma-denver)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Denver, CO · 5K / 1000 m
- **[McGraw Memorial Park "Quick Draw @ McGraw" 2 Mile Trail Race](https://runthis.run/event/rs-191616-mcgraw-memorial-park-quick-draw-mcgraw-2-mile-trail-race)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Bailey, CO · 2.0 mi
- **[Zedikiah Scholarship 5K](https://runthis.run/event/rs-209851-zedikiah-scholarship-5k)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Denver, CO · 5K
- **[Mancos Cowboy Half Marathon, 5K, and Fun Run](https://runthis.run/event/rs-37476-mancos-cowboy-half-marathon-5k-and-fun-run)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Mancos, CO · Marathon / 5K / 1 mile
- **[Hoofin' It Through the Hollows 5K](https://runthis.run/event/rs-52925-hoofin-it-through-the-hollows-5k)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Centennial, CO · 5K
- **[YMCA Creepy Crawl 5K presented by Corwin Honda](https://runthis.run/event/rs-53137-ymca-creepy-crawl-5k-presented-by-corwin-honda)** — Sat, Oct 24, 2026 · 12:00 AM UTC · Palmer Lake, CO · 5K / 1287 m
- **[Ghosts and Goblins 5K/10K](https://runthis.run/event/rs-139699-ghosts-and-goblins-5k-10k)** — Sun, Oct 25, 2026 · 12:00 AM UTC · Denver, CO · 5K / 10K
- **[The 14th Annual Odyssey Odyssey - 2026](https://runthis.run/event/rs-79904-the-14th-annual-odyssey-odyssey-2026)** — Sun, Oct 25, 2026 · 12:00 AM UTC · Denver, CO · 5K / 1 mile
- **[HRCA Backcountry Wilderness Half Marathon](https://runthis.run/event/rs-122685-hrca-backcountry-wilderness-half-marathon)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Lone Tree, CO · Marathon
- **[Halloween Zombie Fun Run 5k & 1mile](https://runthis.run/event/rs-135130-halloween-zombie-fun-run-5k-1mile)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Idaho Springs, CO · 5K / 1 mile
- **[Spooky Sprint - Colorado Springs](https://runthis.run/event/rs-153164-spooky-sprint-colorado-springs)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Colorado Springs, CO · 1 mile / 5K / 10K / Marathon
- **[I Ain't Scared (of 5k)](https://runthis.run/event/rs-198388-i-aint-scared-of-5k)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Thornton, CO · 5K
- **[PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-201633-pb-j-fuel-run-5k-10k-13-1-denver-aurora)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-204690-halloween-trick-or-trot-run-5k-10k-13-1-denver-aurora)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Woodmen Hills Monster Mash 5k and Beer Run](https://runthis.run/event/rs-212437-woodmen-hills-monster-mash-5k-and-beer-run)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Peyton, CO · 5K
- **[Halloween 5K Fundraiser!](https://runthis.run/event/rs-214915-halloween-5k-fundraiser)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Grand Junction, CO · 5K
- **[Halloween Fun 5k](https://runthis.run/event/rs-70585-halloween-fun-5k)** — Sat, Oct 31, 2026 · 12:00 AM UTC · Steamboat Springs, CO · 5K
- **[RMRR November 5k/15k](https://runthis.run/event/rs-104497-rmrr-november-5k-15k)** — Sun, Nov 1, 2026 · 12:00 AM UTC · Denver, CO · 9.3 mi / 5K
- **[All-Out Kooky-Spooky](https://runthis.run/event/rs-140919-all-out-kooky-spooky)** — Sun, Nov 1, 2026 · 12:00 AM UTC · Golden, CO · Marathon / 10K / 5K
- **[Girls on the Run Northern Colorado Fall 5K](https://runthis.run/event/rs-155666-girls-on-the-run-northern-colorado-fall-5k)** — Sun, Nov 1, 2026 · 12:00 AM UTC · Fort Collins, CO · 5K
- **[Feet for Justice Run](https://runthis.run/event/rs-59059-feet-for-justice-run)** — Sun, Nov 1, 2026 · 12:00 AM UTC · Denver, CO · 10K / 5K

_Showing the 150 soonest of 353 upcoming races. The full list is on [the page itself](https://runthis.run/races/colorado)._

## Races by distance in Colorado

- [5K races in Colorado (249)](https://runthis.run/races/colorado/5k.md)
- [10K races in Colorado (115)](https://runthis.run/races/colorado/10k.md)
- [Half Marathon races in Colorado (104)](https://runthis.run/races/colorado/half-marathon.md)
- [Marathon races in Colorado (24)](https://runthis.run/races/colorado/marathon.md)
- [Ultra races in Colorado (25)](https://runthis.run/races/colorado/ultra.md)

## Races by city in Colorado

- [Denver, CO (44)](https://runthis.run/races/colorado/denver.md)
- [Colorado Springs, CO (35)](https://runthis.run/races/colorado/colorado-springs.md)
- [Centennial, CO (32)](https://runthis.run/races/colorado/centennial.md)
- [Fort Collins, CO (19)](https://runthis.run/races/colorado/fort-collins.md)
- [Arvada, CO (16)](https://runthis.run/races/colorado/arvada.md)
- [Littleton, CO (13)](https://runthis.run/races/colorado/littleton.md)
- [Aurora, CO (10)](https://runthis.run/races/colorado/aurora.md)
- [Westminster, CO (10)](https://runthis.run/races/colorado/westminster.md)
- [Pueblo, CO (8)](https://runthis.run/races/colorado/pueblo.md)
- [Boulder, CO (7)](https://runthis.run/races/colorado/boulder.md)
- [Grand Junction, CO (7)](https://runthis.run/races/colorado/grand-junction.md)
- [Durango, CO (6)](https://runthis.run/races/colorado/durango.md)
- [Windsor, CO (6)](https://runthis.run/races/colorado/windsor.md)
- [Estes Park, CO (5)](https://runthis.run/races/colorado/estes-park.md)
- [Loveland, CO (5)](https://runthis.run/races/colorado/loveland.md)
- [Thornton, CO (5)](https://runthis.run/races/colorado/thornton.md)
- [Buena Vista, CO (4)](https://runthis.run/races/colorado/buena-vista.md)
- [Golden, CO (4)](https://runthis.run/races/colorado/golden.md)
- [Longmont, CO (4)](https://runthis.run/races/colorado/longmont.md)
- [Louisville, CO (4)](https://runthis.run/races/colorado/louisville.md)
- [Aspen, CO (3)](https://runthis.run/races/colorado/aspen.md)
- [Broomfield, CO (3)](https://runthis.run/races/colorado/broomfield.md)
- [Crested Butte, CO (3)](https://runthis.run/races/colorado/crested-butte.md)
- [Fruita, CO (3)](https://runthis.run/races/colorado/fruita.md)
- [Parker, CO (3)](https://runthis.run/races/colorado/parker.md)
- [Salida, CO (3)](https://runthis.run/races/colorado/salida.md)
- [Steamboat Springs, CO (3)](https://runthis.run/races/colorado/steamboat-springs.md)

---

Source: [https://runthis.run/races/colorado](https://runthis.run/races/colorado) — data from Run This (runthis.run).