All races in Colorado
Upcoming ultra marathons in Colorado
36 ultra marathons are coming up in Colorado, out of 260 races on the statewide calendar. Compare dates, distances and locations, then get ready with a personalized training plan.
36 upcoming races
September 2026
- Sep 15, 2026Leadville Trail 100 Run📍 Leadville, CO100 mi
- Sep 18, 2026Run Rabbit Run 100📍 Steamboat Springs, CO50 mi · 100 mi
- Sep 18, 2026Run Rabbit Run📍 Steamboat Springs, CO100 mi · 50 mi
- Sep 25, 2026Red Feather Trail Jamboree📍 Red Feather Lakes, CO13.1 mi · 50 mi
- Sep 26, 2026Sangre de Cristo Ultras📍 Westcliffe, CO100 mi · 61 mi · 50 mi · 30.8 mi
- Sep 26, 2026Crested Butte Ultra📍 Crested Butte, CO21.7 mi · 34.2 mi · 50 mi
- Sep 26, 2026Sangre de Cristo Trail Festival📍 Westcliffe, CO8 mi · 16.8 mi · 31.1 mi · 50 mi
- Sep 26, 2026West Line Winder - 50K & 30K📍 Buena Vista, CO18.6 mi · 31.1 mi
- Sep 26, 2026WILD Wahatoya Runs📍 La Veta, CO8 mi · 13.1 mi · 31.1 mi
- Sep 26, 2026Estes Epic📍 Estes Park, CO31 mi · 15 mi
October 2026
- Oct 3, 2026Sage Burner Trail Races📍 Gunnison, CO9.3 mi · 17.4 mi · 31.1 mi
- Oct 3, 2026The Bear Chase Race📍 Lakewood, CO3.1 mi · 6.2 mi · 13.1 mi · 31.1 mi
- Oct 3, 2026Above the Clouds Ultra📍 Woodland Park, CO6.2 mi · 31.1 mi
- Oct 17, 2026Indian Creek Trail Runs📍 Sedaila, CO5.5 mi · 15 mi · 35 mi · 54 mi
- Oct 24, 2026Bridge Burner Ultra📍 Cañon City, CO6.2 mi · 21.7 mi · 31.1 mi · 35 mi
April 2027
- Apr 9, 2027Desert R.A.T.S. Trail Running Festival📍 Fruita, CO62.1 mi · 29.8 mi · 13.1 mi · 5.6 mi
- Apr 10, 2027Trail Running Festival Desert Rats by UTMB®📍 Fruita, CO62.1 mi · 31.1 mi · 13 mi · 6.2 mi
- Apr 17, 2027Rattler Trail Race📍 Colorado Springs, CO31.1 mi · 15.5 mi · 6.2 mi · 3.1 mi
May 2027
- May 1, 2027Greenland Trail Races📍 Palmer Lake, CO4 mi · 8 mi · 15.5 mi · 31.1 mi
- May 29, 2027North Fork 50K Trail Race📍 Pine Grove, CO31.1 mi · 50 mi
June 2027
- Jun 3, 2027Vail Ultra Benefiting For The Fallen📍 Vail, CO50 mi
- Jun 15, 2027Frisco Mountain Goat Kids Trail Running Series📍 Frisco, CO3.1 mi · 804.67 m · 1.5 mi · 1.6 mi
July 2027
- Jul 9, 2027Chase the Moon📍 Highlands Ranch, CO31.1 mi · 3 h · 6 h · 12 h
- Jul 9, 2027Hardrock Hundred Mile Endurance Run📍 Silverton, CO100 mi
- Jul 10, 2027Leadville Silver Rush Trail Run📍 Leadville, CO50 mi · 14.9 mi
- Jul 13, 2027Frisco Mountain Goat Kids Trail Running Series #3📍 Frisco, CO1.6 mi · 3.1 mi · 800 m
- Jul 16, 2027Ouray 100 Mile Endurance Run📍 Ouray, CO100 mi · 50 mi
- Jul 16, 2027High Lonesome 100 Mile📍 Mount Lincoln, CO100 mi
- Jul 17, 2027Powderhorn Mountain Ultra, Vertical Challenge and relay📍 Mesa, CO360 m · 720 m · 6.2 mi
- Jul 23, 2027Never Summer Dirty Double📍 Gould, CO37.3 mi · 62.1 mi
- Jul 26, 2027The Summit 200📍 Frisco, CO200 mi
- Jul 30, 2027Never Summer 100km & 60km📍 Walden, CO37.3 mi · 62.1 mi
August 2027
- Aug 1, 2027Emerald Mountain Epic📍 Steamboat Springs, CO13.1 mi · 26.2 mi
- Aug 6, 2027High Five 100📍 Lake City, CO100 mi
- Aug 7, 2027Volcanic 50📍 Marble Mountain Sno-Park, CO32.4 mi · 14.9 mi
- Aug 13, 2027San Juan Softie 100📍 Durango, CO100 mi
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