Trail running Race Calendar in Colorado, United States

Apr

11

NoCo Urban Ultra & Relay

Bellvue, Colorado, United States

$120.00 - $160.00

Trail running

Ultra

May

01

Greenland Trail Races

Larkspur, Colorado, United States

$35.00 - $90.00

Trail running Running

Ultra 25K 12.9K 6.4K +2

May

15

Endure Trail Runs

Divide, Colorado, United States

$60.00 - $130.00

Running Trail running

11K 22.7K Marathon 12-Hour (Tiny Balls) +1

May

22

Farish Trail Race

Woodland Park, Colorado, United States

Free - $65.00

Trail running

Half-Marathon 10K 5K 1.6K

May

22

Samson's Revenge

Estes Park, Colorado, United States

$112.00 - $160.00

Trail running

10.5K 25K Ultra

Jun

05

Weld Your Mettle Running Festival

Eaton, Colorado, United States

$35.00 - $210.00

Trail running Running

Ultra 6.9K 22.5K Marathon +9

Jun

12

Summits Trail Runs

Granby, Colorado, United States

$60.00 - $130.00

Trail running

Elevation Challenge (14-hr) 9.8K 22.4K 44.7K +1

Jun

24

Race in the Clouds - Alma Dirt Festival

Alma, Colorado, United States

Free - $90.00

Running Mountain biking Duathlon Trail running

Weekend Camping FREE Kids Mountain Bike and Trail Run Ultra Marathon +7

Jul

09

Silverheels Trail Runs

Como, Colorado, United States

$60.00 - $375.00

Trail running

Ultra 17.4K 30.7K +2

Aug

07

Kennebec Mountain Run

Hesperus, Colorado, United States

$75.00

Trail running

24.1K

Aug

07

Sheep Mountain Trail Runs

Fairplay, Colorado, United States

$80.00 - $160.00

Trail running

22.9K Ultra

Aug

14

Pat's Pony Express

Woodland Park, Colorado, United States

$65.00 - $80.00

Trail running

25.7K 12.9K