RunEmu

Ultra Races in Colorado (Page 3)

Browse 90+ upcoming ultra races in Colorado.

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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%

2026 CKF Leadville Trail 100 MTB

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

Roxborough Ultras

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

Rock Hawk

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

Front Range Ultra Dayze

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

Golden Harvest Half Marathon & 5k/10k - Denver

Sep 5, 2026
Denver, CO
50M13.1M6.2M3.1M1M
86°
54°
5%

Grand Traverse Mountain Run

Sep 5, 2026
Crested Butte, CO
40M
71°
34°
7%

Creede Mountain Run

Sep 5, 2026
Loveland, CO
31.1M22M12M2M
84°
49°
4%

Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Sep 6, 2026
Colorado Springs, CO
50M13.1M6.2M3.1M1M
82°
54°
6%

Flaming Foliage Relay - Idaho Springs to Buena Vista

Sep 11, 2026
Idaho Springs, CO
165M
72°
41°
6%

Devil on the Divide

Sep 12, 2026
Empire, CO
31.1M13.7M
71°
41°
5%

American Heroes Run

Sep 12, 2026
Longmont, CO
9HR6HR13.1M9.1M
82°
51°
7%

Valkyrie Relay - Durango

Sep 19, 2026
Durango, CO
91.5M91.5M
76°
42°
7%

Run Rabbit Run

Sep 19, 2026
Steamboat Springs, CO
50M
75°
40°
8%
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