5K races in Colorado, United States — 2026 trail running calendar

Jun

21

Sunset Trail Running Festival

Boulder, Colorado, United States

Trail running

28K 12K 5K 1K

Jun

17

Steamboat Shredder

Steamboat Springs, Colorado, United States

Mountain biking Trail running

4.8K 3.2K 1.6K 25.7K +6

Jun

14

Garden of the Gods 10 Mile/10K and Trail Run

Colorado Springs, Colorado, United States

Running Trail running

16.1K 10K 4.7K

Jun

04

Durango Brewer's Trail Series

Durango, Colorado, United States

Trail running

8K 10K 5K

Jun

03

Emerald Endurance

Steamboat Springs, Colorado, United States

Mountain biking Trail running

4.8K 1.6K Half-Marathon 19.3K +6

May

30

Evergreen Trail Race Series

Evergreen, Colorado, United States

Trail running

5K

May

23

Farish Trail Race

Woodland Park, Colorado, United States

Trail running

Half-Marathon 10K 5K 1.6K

May

02

Take 5 in the Garden

Colorado Springs, Colorado, United States

Trail running Running

15.3K 8K 5K