RunEmu

Ultra Races in Colorado (Page 2)

Browse 90+ upcoming ultra races in Colorado.

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Heatwave Half Marathon - Colorado Springs

Jul 12, 2026
Colorado Springs, CO
50M13.1M10K5K1M
88°
59°
12%

Ouray 100 Mile Endurance Run

Jul 17, 2026
Ouray, CO
100M
80°
53°
13%

High Lonesome 100

Jul 17, 2026
Nathrop, CO
100M
84°
51°
7%

High Lonesome 100

Jul 17, 2026
Livermore, CO
100M
81°
57°
10%

Silverton Alpine Runs

Jul 18, 2026
Silverton, CO
31.1MMarathon8M
80°
53°
13%

Audi Power of Four Trail Run

Jul 18, 2026
Aspen, CO
31M15M10K
76°
49°
9%

Expedition Maroon Bells

Jul 18, 2026
Aspen, CO
28M
76°
49°
9%

Silverton Alpine Marathon and 50K

Jul 18, 2026
Silverton, CO
31.1M26.2M8M
80°
53°
13%

TransRockies Run

Jul 19, 2026
Buena Vista, CO
120M
84°
51°
7%

Never Summer 100km & 60km

Jul 24, 2026
Walden, CO
100M62.1M37.3M
77°
40°
6%

Pikes Peak Ultra

Jul 25, 2026
Colorado Springs, CO
50M31.1M18.6M12.4M
86°
59°
13%

Grand Mesa Ultras

Jul 25, 2026
Cedaredge, CO
50M34.2M18.6M
89°
55°
8%

Creede 50/100

Jul 25, 2026
Loveland, CO
100M
89°
57°
6%

Spirit of the West 5K Run/Walk

Jul 26, 2026
Golden, CO
50M5K
87°
62°
7%

Wild West Relay

Jul 31, 2026
Fort Collins, CO
200M
87°
60°
6%

Winter Park 50K

Aug 1, 2026
Winter Park, CO
31.1M13M10K
67°
43°
11%

Sheep Mountain Trail Runs

Aug 1, 2026
Fairplay, CO
53.1M33M14.2M
66°
41°
15%

Aspen Backcountry Marathon

Aug 1, 2026
Aspen, CO
31.1M26.2M14.6M
75°
49°
9%

Eltuck Valley 5K - Lory Summer Trail Series

Aug 4, 2026
Fort Collins, CO
5000M
87°
59°
5%

High Five 100

Aug 7, 2026
Lake City, CO
100M
70°
41°
13%
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