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Colorado Trail Running Calendar 2025-2026

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Explore the best trail runs in Colorado for 2025-2026! Our updated list features 88 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

June 2026
Jun
27
Saturday

Leadville Trail Marathon and Heavy Half

Trail Run 15 mi 26 mi
July 2026
Jul
4
Saturday

Pueblo's Firecracker 5k

Trail Run 3 mi
Jul
9-12
Th - Su

High Trails Trail Running Retreat

Trail Run 20 mi
Jul
10-11
Fr - Sa

Silverheels Trail Runs

Trail Run 10 mi 19 mi ... 100 km 100 mi
Jul
10
Friday

Hardrock 100

Trail Run 100 mi
Jul
11
Saturday

Grin & Bear It

Trail Run 15 km 25 km
Jul
11-13
Sa - Mo

Silver Rush 50

Trail Run 5 km 15 mi 48 mi
Jul
17
Friday

Ouray 100 Mile Endurance Run

Trail Run 100 mi
Jul
17-18
Fr - Sa

High Lonesome 100

Trail Run 100 mi
Jul
18
Saturday

Silverton Alpine Runs

Trail Run 8 mi Marathon 50 km
Jul
19
Sunday

Barr Trail Mountain Race

Trail Run 13 mi
Jul
19-21
Su - Tu

Transrockies Run

Trail Run 35 mi 51 mi
Jul
19
Sunday

Kendall Mountain Run

Trail Run 11 km 12 mi
Jul
24-27
Fr - Mo

Never Summer 100Km

Trail Run 60 km 100 km
Jul
25
Saturday

Pikes Peak Ultra

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

Creede 100

Trail Run 100 mi
Jul
27
Monday

The Summit 200

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

Wild West Relay

Trail Run 200 mi
August 2026
Aug
1
Saturday

Sheep Mountain Ultras

Trail Run Half Marathon 50 km 50 mi
Aug
1
Saturday

Kennebec Mountain Run

Trail Run 15 mi
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