# Half Marathon Races in Colorado (2026)

> 88 upcoming Half Marathon races across Colorado.

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

## Races

- **[Choice City Running Festival](https://runthis.run/event/rs-127976-choice-city-running-festival)** — Thu, Aug 6, 2026 · 7:00 PM CDT · Fort Collins, CO · 1 mile / Marathon / 10K / 5K
- **[All-Out Runapalooza](https://runthis.run/event/rs-140867-all-out-runapalooza)** — Fri, Aug 7, 2026 · 7:00 PM CDT · Arvada, CO · Marathon / 10K / 5K
- **[Run for PB& J 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-198867-run-for-pb-j-5k-10k-13-1-denver-aurora)** — Fri, Aug 14, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Bagel Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-199392-bagel-run-5k-10k-13-1-denver-aurora)** — Fri, Aug 14, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Erie Half & 5k](https://runthis.run/event/rs-15290-erie-half-5k)** — Sat, Aug 15, 2026 · 7:00 PM CDT · Erie, CO · Marathon / 5K
- **[Staunton Rocks! Marathon and Half Marathon](https://runthis.run/event/rs-175312-staunton-rocks-marathon-and-half-marathon)** — Fri, Aug 21, 2026 · 7:00 PM CDT · Pine, CO · Marathon
- **[Byers Peak Stampede Half Marathon & 5K Run](https://runthis.run/event/rs-71835-byers-peak-stampede-half-marathon-5k-run)** — Fri, Aug 21, 2026 · 7:00 PM CDT · Fraser, CO · Marathon / 3.0 mi
- **[Pioneer Prairie Dog Half, 10k & 5k](https://runthis.run/event/rs-3356-pioneer-prairie-dog-half-10k-5k)** — Sat, Aug 22, 2026 · 7:00 PM CDT · Westminster, CO · Marathon / 10K / 5K
- **[TBK Bank Thirsty 13 Half Marathon](https://runthis.run/event/rs-17452-tbk-bank-thirsty-13-half-marathon)** — Fri, Aug 28, 2026 · 7:00 PM CDT · Durango, CO · Marathon
- **[Sloth Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-198465-sloth-run-5k-10k-13-1-denver-aurora)** — Fri, Aug 28, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-199871-run-for-breast-cancer-5k-10k-13-1-denver-aurora)** — Fri, Aug 28, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Golden Harvest Half Marathon & 5k/10k - Denver](https://runthis.run/event/rs-194302-golden-harvest-half-marathon-5k-10k-denver)** — Fri, Sep 4, 2026 · 7:00 PM CDT · Westminster, CO · 50 m / 1 mile / 5K / 10K / Marathon
- **[Golden Harvest Half Marathon & 5k/10k - Colorado Springs](https://runthis.run/event/rs-194388-golden-harvest-half-marathon-5k-10k-colorado-springs)** — Sat, Sep 5, 2026 · 7:00 PM CDT · Colorado Springs, CO · 50 m / 1 mile / 5K / 10K / Marathon
- **[Labor Day Half Marathon](https://runthis.run/event/rs-30929-labor-day-half-marathon)** — Sun, Sep 6, 2026 · 7:00 PM CDT · Parker, CO · Marathon / 10K / 5K
- **[Trail Sisters Women's Half Marathon & 10k](https://runthis.run/event/rs-142537-trail-sisters-womens-half-marathon-10k)** — Fri, Sep 11, 2026 · 7:00 PM CDT · Buena Vista, CO · Marathon / 10K
- **[Black Squirrel Half Marathon](https://runthis.run/event/rs-175341-black-squirrel-half-marathon)** — Fri, Sep 11, 2026 · 7:00 PM CDT · Bellvue, CO · Marathon
- **[National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-198499-national-chocolate-day-run-for-chocolates-5k-10k-13-1-denver)** — Fri, Sep 11, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Run for Mental Health 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-199914-run-for-mental-health-5k-10k-13-1-denver-aurora)** — Fri, Sep 11, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[RMRR Fall Marathon Training Series #2](https://runthis.run/event/rs-150894-rmrr-fall-marathon-training-series-2)** — Sat, Sep 12, 2026 · 7:00 PM CDT · Thornton, CO · 12.4 mi / 18.6 mi
- **[Autumn Run](https://runthis.run/event/rs-129362-autumn-run)** — Fri, Sep 18, 2026 · 7:00 PM CDT · Buena Vista, CO · Marathon / 10K / 5K / 1000 m
- **[All-Out Fall Fest](https://runthis.run/event/rs-140875-all-out-fall-fest)** — Fri, Sep 18, 2026 · 7:00 PM CDT · Westminster, CO · Marathon / 10K / 5K
- **[Pikes Peak Ascent](https://runthis.run/event/rs-67237-pikes-peak-ascent)** — Fri, Sep 18, 2026 · 7:00 PM CDT · Manitou Springs, CO · 13.3 mi
- **[Fall Equinox](https://runthis.run/event/rs-157755-fall-equinox)** — Sat, Sep 19, 2026 · 7:00 PM CDT · Fort Collins, CO · Marathon / 5.0 mi
- **[Red Feather Trail Jamboree](https://runthis.run/event/rs-175348-red-feather-trail-jamboree)** — Thu, Sep 24, 2026 · 7:00 PM CDT · Red Feather Lakes, CO · 50.0 mi / 31.1 mi / Marathon / 94.0 mi
- **[Oktoberfest Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-199674-oktoberfest-run-5k-10k-13-1-denver-aurora)** — Fri, Sep 25, 2026 · 7:00 PM CDT · 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)** — Fri, Sep 25, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[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)** — Sat, Sep 26, 2026 · 7:00 PM CDT · Boulder, CO · Marathon / 5K / 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-)** — Fri, Oct 2, 2026 · 7:00 PM CDT · Canon City, CO · 5K / 8.0 mi / Marathon / 10K
- **[Spooky Sprint - Denver](https://runthis.run/event/rs-153154-spooky-sprint-denver)** — Fri, Oct 2, 2026 · 7:00 PM CDT · Littleton, CO · 50 m / 1 mile / 5K / 10K / Marathon
- **[Colorado Springs Marathon, Half, 5K, and Kids K](https://runthis.run/event/rs-95592-colorado-springs-marathon-half-5k-and-kids-k)** — Fri, Oct 2, 2026 · 7:00 PM CDT · Colorado Springs, CO · Marathon / 5K / 1000 m
- **[Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run](https://runthis.run/event/rs-84571-windsor-marathon-half-marathon-10k-5k-1-mile-run)** — Sat, Oct 3, 2026 · 7:00 PM CDT · Windsor, CO · Marathon / 10K / 5K / 1 mile
- **[Breckenridge RunFest](https://runthis.run/event/rs-178572-breckenridge-runfest)** — Fri, Oct 9, 2026 · 7:00 PM CDT · Breckenridge, CO · Marathon / 10K / 5K / 1 mile
- **[Bagel Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-201389-bagel-run-5k-10k-13-1-denver-aurora)** — Fri, Oct 9, 2026 · 7:00 PM CDT · 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)** — Fri, Oct 9, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[The Long View Marathon](https://runthis.run/event/rs-72759-the-long-view-marathon)** — Fri, Oct 9, 2026 · 7:00 PM CDT · Fort Collins, CO · Marathon / 5K
- **[Westy Half & 5k](https://runthis.run/event/rs-15288-westy-half-5k)** — Sat, Oct 10, 2026 · 7:00 PM CDT · Westminster, CO · Marathon / 5K
- **[Durango Marathon](https://runthis.run/event/rs-197219-durango-marathon)** — Sat, Oct 10, 2026 · 7:00 PM CDT · Durango, CO · Marathon
- **[Blue Sky Trail Marathon & Half Marathon](https://runthis.run/event/rs-175360-blue-sky-trail-marathon-half-marathon)** — Fri, Oct 16, 2026 · 7:00 PM CDT · Fort Collins, CO · 26.7 mi / 13.8 mi
- **[Mancos Cowboy Half Marathon, 5K, and Fun Run](https://runthis.run/event/rs-37476-mancos-cowboy-half-marathon-5k-and-fun-run)** — Fri, Oct 23, 2026 · 7:00 PM CDT · Mancos, CO · Marathon / 5K / 1 mile
- **[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)** — Fri, Oct 30, 2026 · 7:00 PM CDT · 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)** — Fri, Oct 30, 2026 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[All-Out Kooky-Spooky](https://runthis.run/event/rs-140919-all-out-kooky-spooky)** — Sat, Oct 31, 2026 · 7:00 PM CDT · Golden, CO · Marathon / 10K / 5K
- **[HRCA Backcountry Wilderness Half Marathon](https://runthis.run/event/rs-122685-hrca-backcountry-wilderness-half-marathon)** — Fri, Nov 6, 2026 · 6:00 PM CST · Lone Tree, CO · Marathon
- **[Turkey Trails- Denver](https://runthis.run/event/rs-153202-turkey-trails-denver)** — Fri, Nov 6, 2026 · 6:00 PM CST · Littleton, CO · 50 m / 1 mile / 5K / 10K / Marathon
- **[Turkey Trails - Colorado Springs](https://runthis.run/event/rs-153198-turkey-trails-colorado-springs)** — Sat, Nov 7, 2026 · 6:00 PM CST · Colorado Springs, CO · 50 m / 1 mile / 5K / 10K / Marathon
- **[Run for Mental Health 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-201423-run-for-mental-health-5k-10k-13-1-denver-aurora)** — Fri, Nov 13, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-205124-veterans-day-freedom-run-5k-10k-13-1-denver-aurora)** — Fri, Nov 13, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[TURKEY TREK (13.1, 10k, 5k & 2k)](https://runthis.run/event/rs-1649-turkey-trek-13-1-10k-5k-2k)** — Fri, Nov 20, 2026 · 6:00 PM CST · Arvada, CO · Marathon / 10K / 5K / 1.2 mi
- **[Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-201458-coffee-lovers-run-5k-10k-13-1-denver-aurora)** — Fri, Nov 27, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-205276-thanksgiving-gobble-trot-run-5k-10k-13-1-denver-aurora)** — Fri, Nov 27, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[All-Out Fa La La](https://runthis.run/event/rs-140922-all-out-fa-la-la)** — Fri, Dec 4, 2026 · 6:00 PM CST · Westminster, CO · Marathon / 10K / 5K
- **[Rock Canyon Half Marathon- 40th Anniversary Run!](https://runthis.run/event/rs-42748-rock-canyon-half-marathon-40th-anniversary-run)** — Sat, Dec 5, 2026 · 6:00 PM CST · Pueblo, CO · Marathon / 5K
- **[Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-204847-run-for-breast-cancer-5k-10k-13-1-denver-aurora)** — Fri, Dec 11, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Sunrise Marathon 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-207976-sunrise-marathon-5k-10k-13-1-denver-aurora)** — Fri, Dec 11, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-204950-a-merry-christmas-run-5k-10k-13-1-denver-aurora)** — Fri, Dec 25, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[New Year's Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-207994-new-years-run-5k-10k-13-1-denver-aurora)** — Fri, Dec 25, 2026 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[All-Out Polar Prowl](https://runthis.run/event/rs-140791-all-out-polar-prowl)** — Fri, Jan 8, 2027 · 6:00 PM CST · Arvada, CO · Marathon / 10K / 5K
- **[ALMAGEDDON Winter Triathlon presented by the Alma Foundation](https://runthis.run/event/rs-190024-almageddon-winter-triathlon-presented-by-the-alma-foundation)** — Fri, Jan 15, 2027 · 6:00 PM CST · Alma, CO · 12.5 mi
- **[MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-209344-mlk-jr-freedom-run-5k-10k-13-1-denver-aurora)** — Fri, Jan 15, 2027 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Sunrise Marathon 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-210560-sunrise-marathon-5k-10k-13-1-denver-aurora)** — Fri, Jan 15, 2027 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Alley Loop](https://runthis.run/event/rs-124781-alley-loop)** — Fri, Jan 29, 2027 · 6:00 PM CST · Crested Butte, CO · Marathon / 10K / 5K / 1.9 mi / 1000 m
- **[Coffee Lover Run DENVER/AURORA](https://runthis.run/event/rs-209491-coffee-lover-run-denver-aurora)** — Fri, Jan 29, 2027 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Run for Donut DENVER/AURORA](https://runthis.run/event/rs-210591-run-for-donut-denver-aurora)** — Fri, Jan 29, 2027 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[All-Out Mardi Crawl](https://runthis.run/event/rs-140664-all-out-mardi-crawl)** — Fri, Feb 5, 2027 · 6:00 PM CST · Arvada, CO · Marathon / 10K / 5K
- **[Stories Trail Runs](https://runthis.run/event/rs-97285-stories-trail-runs)** — Fri, Feb 5, 2027 · 6:00 PM CST · Colorado Springs, CO · 6.7 mi / Marathon / 19.6 mi
- **[Valentine's Day Run 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-209854-valentines-day-run-5k-10k-13-1-denver-aurora)** — Fri, Feb 12, 2027 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Run for Chocolate 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-210643-run-for-chocolate-5k-10k-13-1-denver-aurora)** — Fri, Feb 12, 2027 · 6:00 PM CST · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[The Toyota Super Half Marathon™& Game Day 5K™](https://runthis.run/event/rs-37447-the-toyota-super-half-marathon-game-day-5k)** — Sat, Feb 13, 2027 · 6:00 PM CST · Colorado Springs, CO · Marathon / 5K
- **[22nd Annual Run Through Time Trail Marathon and Half Marathon](https://runthis.run/event/rs-115596-22nd-annual-run-through-time-trail-marathon-and-half-maratho)** — Fri, Mar 12, 2027 · 6:00 PM CST · Salida, CO · Marathon / 2.0 mi
- **[Lucky Brew Race 5K, 10K, 15k & Half Marathon](https://runthis.run/event/rs-104479-lucky-brew-race-5k-10k-15k-half-marathon)** — Sat, Mar 13, 2027 · 6:00 PM CST · Severance, CO · 5K / 10K / 9.3 mi / 966 m / Marathon
- **[Sunrise Marathon 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-211550-sunrise-marathon-5k-10k-13-1-denver-aurora)** — Fri, Mar 19, 2027 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[All-Out Spring Fever](https://runthis.run/event/rs-140771-all-out-spring-fever)** — Sat, Mar 20, 2027 · 7:00 PM CDT · Golden, CO · Marathon / 10K / 5K
- **[Spring Equinox](https://runthis.run/event/rs-155521-spring-equinox)** — Sat, Mar 20, 2027 · 7:00 PM CDT · Wellington, CO · Marathon / 5K
- **[Run for Bagels 5K/10K/13.1 DENVER/AURORA](https://runthis.run/event/rs-211415-run-for-bagels-5k-10k-13-1-denver-aurora)** — Fri, Apr 9, 2027 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[Platte River Half-Marathon, Relay & 5k](https://runthis.run/event/rs-169861-platte-river-half-marathon-relay-5k)** — Sat, Apr 10, 2027 · 7:00 PM CDT · Littleton, CO · Marathon / 5K
- **[Horsetooth Half Marathon - Presented by Fort Collins Connexion](https://runthis.run/event/rs-80252-horsetooth-half-marathon-presented-by-fort-collins-connexion)** — Sat, Apr 17, 2027 · 7:00 PM CDT · Fort Collins, CO · Marathon
- **[All-Out Beat the Heat](https://runthis.run/event/rs-140777-all-out-beat-the-heat)** — Fri, Apr 23, 2027 · 7:00 PM CDT · Westminster, CO · Marathon / 10K / 5K
- **[Bigfoot Half Marathon](https://runthis.run/event/rs-165806-bigfoot-half-marathon)** — Fri, Apr 23, 2027 · 7:00 PM CDT · Estes Park, CO · Marathon / 5K
- **[Coffee Lover Run DENVER/AURORA](https://runthis.run/event/rs-211446-coffee-lover-run-denver-aurora)** — Fri, Apr 23, 2027 · 7:00 PM CDT · Centennial, CO · 5K / 10K / Marathon / 1 mile
- **[The Colorado Marathon](https://runthis.run/event/rs-169856-the-colorado-marathon)** — Sat, May 1, 2027 · 7:00 PM CDT · Fort Collins, CO · Marathon / 10K / 5K
- **[Colorado 13er (Half Marathon/10k/5k)](https://runthis.run/event/rs-10366-colorado-13er-half-marathon-10k-5k)** — Sat, Jun 5, 2027 · 7:00 PM CDT · Louisville, CO · Marathon / 10K / 5K
- **[All-Out Summer Breeze](https://runthis.run/event/rs-140793-all-out-summer-breeze)** — Fri, Jun 11, 2027 · 7:00 PM CDT · Arvada, CO · Marathon / 10K / 5K
- **[Summits Trail Runs](https://runthis.run/event/rs-174095-summits-trail-runs)** — Fri, Jun 11, 2027 · 7:00 PM CDT · Granby, CO · 6.1 mi / 13.9 mi / 27.8 mi / 33.9 mi
- **[Race in the Clouds - Alma Dirt Festival 2027](https://runthis.run/event/rs-187048-race-in-the-clouds-alma-dirt-festival-2027)** — Wed, Jun 23, 2027 · 7:00 PM CDT · Alma, CO · 38.0 mi / 26.0 mi / Marathon / 22.0 mi / 10K / 6.1 mi
- **[All-Out Dog Days](https://runthis.run/event/rs-140866-all-out-dog-days)** — Fri, Jul 9, 2027 · 7:00 PM CDT · Westminster, CO · Marathon / 10K / 5K
- **[Summer Splash Prairie Dog Half, 10k, & 5k](https://runthis.run/event/rs-8929-summer-splash-prairie-dog-half-10k-5k)** — Fri, Jul 16, 2027 · 7:00 PM CDT · Castle Rock, CO · Marathon / 10K / 5K
- **[50 States Half Marathon Club General Membership](https://runthis.run/event/rs-159927-50-states-half-marathon-club-general-membership)** — Thu, Feb 9, 2034 · 6:00 PM CST · Colorado Springs, CO · Marathon
- **[Fifty States Half Marathon Club Life Membership](https://runthis.run/event/rs-159931-fifty-states-half-marathon-club-life-membership)** — Fri, Feb 10, 2034 · 6:00 PM CST · Colorado Springs, CO · Marathon

## Half Marathon races by city

- [Centennial, CO (29)](https://runthis.run/races/colorado/centennial/half-marathon.md)
- [Colorado Springs, CO (7)](https://runthis.run/races/colorado/colorado-springs/half-marathon.md)
- [Westminster, CO (7)](https://runthis.run/races/colorado/westminster/half-marathon.md)
- [Fort Collins, CO (6)](https://runthis.run/races/colorado/fort-collins/half-marathon.md)
- [Arvada, CO (5)](https://runthis.run/races/colorado/arvada/half-marathon.md)
- [Littleton, CO (3)](https://runthis.run/races/colorado/littleton/half-marathon.md)

---

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