# Ultra Races in Colorado (2026) > 28 upcoming Ultra races across Colorado. - **Page:** https://runthis.run/races/colorado/ultra ## Races - **[2026 CKF Leadville Trail 100 MTB](https://runthis.run/event/rs-130532-2026-ckf-leadville-trail-100-mtb)** — Fri, Aug 14, 2026 · 7:00 PM CDT · Leadville, CO · 100.0 mi - **[Continental Divide Trail Run](https://runthis.run/event/rs-134443-continental-divide-trail-run)** — Fri, Aug 28, 2026 · 7:00 PM CDT · Steamboat Springs, CO · 5.0 mi / 16.0 mi / 31.1 mi - **[Flaming Foliage Relay - Idaho Springs to Buena Vista](https://runthis.run/event/rs-140121-flaming-foliage-relay-idaho-springs-to-buena-vista)** — Thu, Sep 10, 2026 · 7:00 PM CDT · Idaho Springs, CO · 165.0 mi - **[2026 Lake Nighthorse Triathlon - Sprint and Olympic](https://runthis.run/event/rs-177570-2026-lake-nighthorse-triathlon-sprint-and-olympic)** — Fri, Sep 11, 2026 · 7:00 PM CDT · Durango, CO · 16.0 mi / 32.0 mi - **[Rampart Rager Gravel](https://runthis.run/event/rs-207178-rampart-rager-gravel)** — Fri, Sep 11, 2026 · 7:00 PM CDT · Colorado Springs, CO · 32.0 mi / 44.0 mi / 62.0 mi - **[The Gunni Grinder](https://runthis.run/event/rs-88732-the-gunni-grinder)** — Fri, Sep 11, 2026 · 7:00 PM CDT · Gunnison, CO · 120.0 mi / 60.0 mi / 30.0 mi - **[Buffalo Bicycle Classic](https://runthis.run/event/rs-27198-buffalo-bicycle-classic)** — Sat, Sep 12, 2026 · 7:00 PM CDT · Boulder, CO · 35.0 mi / 50.0 mi / 70.0 mi / 100.0 mi / 75.0 mi / 60.0 mi / 42.3 mi / 14.0 mi - **[Salida Bike Fest - Salida 76 and the Banana Belt](https://runthis.run/event/rs-177768-salida-bike-fest-salida-76-and-the-banana-belt)** — Fri, Sep 18, 2026 · 7:00 PM CDT · Salida, CO · 76.0 mi / 47.2 mi / 35.0 mi - **[Beulah Challenge and OverIt Series](https://runthis.run/event/rs-46556-beulah-challenge-and-overit-series)** — Fri, Sep 18, 2026 · 7:00 PM CDT · Beulah, CO · 10K / 5K / 32.4 mi - **[CG Adventure Club - Elevation Everest](https://runthis.run/event/rs-198665-cg-adventure-club-elevation-everest)** — Tue, Sep 22, 2026 · 7:00 PM CDT · Winter Park, CO · 22.0 mi / 42.0 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 - **[West Line Winder](https://runthis.run/event/rs-106927-west-line-winder)** — Fri, Sep 25, 2026 · 7:00 PM CDT · Buena Vista, CO · 31.1 mi / 18.6 mi - **[Mountains to the Desert Classic](https://runthis.run/event/rs-143126-mountains-to-the-desert-classic)** — Fri, Sep 25, 2026 · 7:00 PM CDT · Telluride, CO · 103.0 mi / 73.0 mi / 110.0 mi - **[Estes Epic](https://runthis.run/event/rs-180837-estes-epic)** — Fri, Sep 25, 2026 · 7:00 PM CDT · Estes Park, CO · 31.0 mi / 15.0 mi / 62.0 mi - **[Sangre de Cristo Trail Festival](https://runthis.run/event/rs-98116-sangre-de-cristo-trail-festival)** — Fri, Sep 25, 2026 · 7:00 PM CDT · 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)** — Sat, Sep 26, 2026 · 7:00 PM CDT · Nathrop, CO · 31.1 mi - **[Water For People World Water Classic](https://runthis.run/event/rs-94683-water-for-people-world-water-classic)** — Thu, Oct 1, 2026 · 7:00 PM CDT · Anywhere, CO · 3.7 mi / 37.3 mi - **[Suffer Better 10th Annual Fall Trail Runs](https://runthis.run/event/rs-77745-suffer-better-10th-annual-fall-trail-runs)** — Fri, Oct 9, 2026 · 7:00 PM CDT · Pine, CO · 31.1 mi / 15.5 mi / 5K - **[Indian Creek Trail Runs](https://runthis.run/event/rs-98111-indian-creek-trail-runs)** — Fri, Oct 16, 2026 · 7:00 PM CDT · Sedalia, CO · 5.5 mi / 15.0 mi / 35.0 mi / 54.0 mi - **[Sawmill Trail Runs](https://runthis.run/event/rs-96807-sawmill-trail-runs)** — Fri, Dec 4, 2026 · 6:00 PM CST · Pine, CO · 8.1 mi / 16.1 mi / 31.7 mi - **[NoCo Urban Ultra & Relay](https://runthis.run/event/rs-174331-noco-urban-ultra-relay)** — Sat, Apr 10, 2027 · 7:00 PM CDT · Bellvue, CO · 50.0 mi / 100.0 mi - **[Greenland Trail Races](https://runthis.run/event/rs-30928-greenland-trail-races)** — Fri, Apr 30, 2027 · 7:00 PM CDT · Larkspur, CO · 31.1 mi / 15.5 mi / 8.0 mi / 4.0 mi - **[Samson's Revenge](https://runthis.run/event/rs-208215-samsons-revenge)** — Fri, May 21, 2027 · 7:00 PM CDT · Estes Park, CO · 6.5 mi / 15.5 mi / 31.1 mi - **[Weld Your Mettle Running Festival](https://runthis.run/event/rs-121276-weld-your-mettle-running-festival)** — Fri, Jun 4, 2027 · 7:00 PM CDT · Eaton, CO · 50.0 mi / 62.1 mi / 4.3 mi / 14.0 mi / Marathon / 31.1 mi / 200.0 mi - **[KowTown Gravel](https://runthis.run/event/rs-160280-kowtown-gravel)** — Fri, Jun 11, 2027 · 7:00 PM CDT · Kremmling, CO · 88.0 mi / 54.0 mi / 28.0 mi / 16.0 mi - **[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 - **[Silverheels Trail Runs](https://runthis.run/event/rs-98981-silverheels-trail-runs)** — Thu, Jul 8, 2027 · 7:00 PM CDT · Como, CO · 10.8 mi / 19.1 mi / 38.3 mi / 53.8 mi / 63.1 mi / 106.2 mi --- Source: [https://runthis.run/races/colorado/ultra](https://runthis.run/races/colorado/ultra) — data from Run This (runthis.run).