Trail running Race Calendar in Colorado, United States

Evergreen Trail Race Series

Evergreen, Colorado, United States

30 May, 2026 (Sat) – 22 Aug, 2026

$40.00

Trail running

5K

Samson's Revenge

Estes Park, Colorado, United States

23 May, 2026 (Sat)

Trail running

10.5K 25K Ultra

Farish Trail Race

Woodland Park, Colorado, United States

23 May, 2026 (Sat)

Trail running

Half-Marathon 10K 5K 1.6K

Endure Trail Runs

Divide, Colorado, United States

16 May, 2026 (Sat)

Running, Trail running

11K 22.7K Marathon

The Great CO74 Trail Run

Kittredge, Colorado, United States

09 May, 2026 (Sat)

Trail running

11.9K

Valkyrie Trail Race

Colorado Springs, Colorado, United States

09 May, 2026 (Sat)

Trail running

49.6K Marathon 28K Half-Marathon +2

Quad Rock 25 & 50 Mile Trail Races

Bellvue, Colorado, United States

09 May, 2026 (Sat)

Trail running

Ultra 40.2K

Greenland Trail Races

Larkspur, Colorado, United States

02 May, 2026 (Sat)

Trail running, Running

Ultra 25K 12.9K 6.4K +2

Take 5 in the Garden

Colorado Springs, Colorado, United States

02 May, 2026 (Sat)

Trail running, Running

15.3K 8K 5K