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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!

July 2026
Jul
18
Sa

Spring Creek Memorial Trail Run

Trail Run 5 mi 10 mi
Jul
18
Sa

Power of Four Trail Run

Trail Run 10 km 25 km 50 km
Jul
19
Su

Barr Trail Mountain Race

Trail Run 13 mi
Jul
19-21
Su - Tu

Transrockies Run

Trail Run 35 mi 51 mi
Jul
19
Su

Kendall Mountain Run

Trail Run 11 km 12 mi
Jul
19
Su

Barr Trail Mountain Race

Trail Run 13 mi
Jul
25
Sa

Pikes Peak Ultra

Trail Run 20 km 30 km 50 km 50 mi
Jul
25-26
Sa - Su

Never Summer 100Km

Trail Run 60 km 100 km
Jul
25-26
Sa - Su

Creede 100

Trail Run 100 mi
Jul
25
Sa

Grand Mesa Ultras

Trail Run 30 km 55 km 50 mi
Jul
27
Mo

The Summit 200

Trail Run 200 mi
Jul-Aug
31-1
Fr - Sa

Wild West Relay

Trail Run 200 mi
August 2026
Aug
1
Sa

Sheep Mountain Ultras

Trail Run Half Marathon 50 km 50 mi
Aug
1
Sa

Kennebec Mountain Run

Trail Run 15 mi
Aug
1
Sa

Aspen Backcountry Marathon

Trail Run Half Marathon Marathon 50 km
Aug
1
Sa

Winter Park 50K

Trail Run 10 km 50 km
Aug
2
Su

Buena Vista Pack Burro Race

Trail Run 7 mi 13 mi
Aug
4
Tu

Lory Summer Trail Series

Trail Run 5 km 10 km 12 km
Aug
7
Fr

High Five 100 - Lake City, CO

Trail Run 100 mi
Aug
8
Sa

Run The Rockies Trail Race

Trail Run 5 km 10 km Half Marathon