Ultras in Colorado
Every upcoming Ultra race we know about in Colorado. Where a detail isn't confirmed, we mark it unknown rather than guessing.
Race results
Showing 7+ of 7 races · loading the full list…
Sat, May 1, 2027 · 7:00 AM · Larkspur, CO
Greenland Trail Races
4M8M25KUltra
- Price
- $39.80-$99.20
- Field size
- 185 · based on the organizer's entry cap
Sat, Jun 5, 2027 · 6:00 AM · Eaton, CO
Weld Your Mettle Running Festival
4.3M14MMarathonUltra
- Price
- $48.70-$244.80
Fri, Jun 25, 2027 · 1:30 PM · Alma, CO
Race in the Clouds - Alma Dirt Festival 2027
10KHalf Marathon22MMarathonUltra2,600 ft gain
- Price
- $43.40-$69.90
Fri, Sep 10, 2027 · 5:00 AM · Idaho Springs, CO
Flaming Foliage Relay - Idaho Springs to Buena Vista
Ultra
- Price
- Price on registration site