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Colorado Trail Running Calendar 2026-2027

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Monthly updates for Colorado

Get new running races (and updates) in your inbox every month.

Explore the best trail runs in Colorado for 2026-2027! Our updated list features 131 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

January 2026
Jan
24-25
Sa - Su

USCSA Cross Country Ski Racing Festival

Trail Run 3 km 8 km 15 km
Jan
24
Sa

Rio Frio on Ice

Trail Run 5 km
Jan
25
Su

Freakin Freezin 5K - Denver

Trail Run 5 km
Jan
25
Su

Know The Snow Rando Race

Trail Run 6 mi 10 mi
Jan
31
Sa

Sourdough Snowshoe Race

Trail Run 18 km 30 km
February 2026
Feb
8
Su

Super Sunday 5K

Trail Run 5 km
Feb
14
Sa

Pine Needle Langlauf Nordic Ski Race

Trail Run 3 km 8 km 15 km 30 km
Feb
15
Su

Gothic Mountain Tour

Trail Run 18 mi 24 mi
Feb
21-22
Sa - Su

Stories Trail Runs

Trail Run 10 km Half Marathon ... 6 hr 15 hr
Feb
28
Sa

Uncle Clyde's Run & Slide

Trail Run 60 min 90 min
March 2026
Mar
14
Sa

Run Through Time Trail Marathon

Trail Run 2 mi 13 mi 26 mi
April 2026
Apr
4
Sa

Race the Ranch

Trail Run 5 km 25 km 50 km
Apr
9-12
Th - Su

Desert Rats Trail Running Festival

Trail Run 9 km Half Marathon 48 km 100 km
Apr
10-11
Fr - Sa

Run The Ranch

Trail Run 5 km 10 km ... 6 hr 12 hr
Apr
11
Sa

Mountain Ridge Trail Race

Trail Run 3 mi 6 mi 13 mi 22 mi
Apr
11-12
Sa - Su

NoCo Urban Ultra

Trail Run 50 mi 100 mi
Apr
18
Sa

Rattler Trail Race

Trail Run 5 km 10 km 25 km 50 km
Apr
25
Sa

Royal Gorge Groove

Trail Run 5 km 13 km ... 30 km 50 km
May 2026
May
2
Sa

Greenland Trail Races

Trail Run 4 mi 8 mi 25 km 50 km
May
2
Sa

Niwot's Challenge

Trail Run 24 mi 50 mi 100 mi