RunEmu

Ultra Races in Colorado (Page 3)

Browse 99+ upcoming ultra races in Colorado.

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Creede 50/100

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

Grand Mesa Ultras

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

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%

Sheep Mountain Trail Runs

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

Winter Park 50K

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

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%

Summer Sizzler- Denver

Aug 8, 2026
Denver, CO
50M6.2M3.1M1M
89°
59°
5%

Summer Sizzler- Colorado Springs

Aug 9, 2026
Colorado Springs, CO
50M9.3M6.2M3.1M1M
85°
58°
12%

San Juan Softie 100

Aug 14, 2026
Durango, CO
100M
85°
52°
5%

Roxborough Ultras

Aug 15, 2026
Littleton, CO
50M31.1M
86°
58°
7%

2026 CKF Leadville Trail 100 MTB

Aug 15, 2026
Leadville, CO
100M
69°
38°
7%

Leadville Trail 100 Mile Run

Aug 22, 2026
Leadville, CO
100M
69°
37°
7%

Telluride Mountain Run

Aug 23, 2026
Telluride, CO
65M40M24M14M
77°
51°
9%

Rock Hawk

Aug 29, 2026
Castle Rock, CO
31.1M15.5M10K5K
83°
53°
6%

Rock Hawk Trail Races

Aug 29, 2026
Castle Rock, CO
31.1M15.5M10K5K
83°
53°
6%

Continental Divide Trail Run

Aug 29, 2026
Steamboat Springs, CO
31.1M16M5M
82°
46°
6%

Front Range Ultra Dayze

Sep 3, 2026
Loveland, CO
100HR72HR200M48HR100M24HR12HR31.1M
85°
49°
4%
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