Idaho Trail Running Calendar 2025-2026

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Explore the best trail runs in Idaho for 2025-2026! Our updated list features 90 exciting races across the region. Find your next race in Idaho below and join the running community at these great events!

August 2025
Aug
15
Friday

Inkom Last Man Standing 1.1

Backyard Ultra
Aug
16
Saturday

The Great Snake River Triathlon

Triathlon
Aug
16
Saturday

Aaron Butler Memorial Purple Heart Run: Idaho

5 km 10 km
Aug
23
Saturday

Harriman 25K/50K Trail Run

Trail Run 25 km 50 km
Aug
23
Saturday

Priest Lake Triathlon

Triathlon
Aug
23
Saturday

Foothills XC 12K

Trail Run 5 km 12 km
Aug
30
Saturday

Pocatello Marathon

5 km 10 km 13 mi 26 mi
Aug
30
Saturday

Idaho Triple Crown Marathon

Aug
31
Sunday

Payette Lake Run

Trail Run
September 2025
Sep
6
Saturday

Salmon Marathon

13 mi 26 mi
Sep
13
Saturday

Priest Lake Marathon

26 mi
Sep
13
Saturday

Bear Lake Brawl Triathlon

Triathlon
Sep
13
Saturday

RIM2RIM Race

Trail Run 3 mi 7 mi
Sep
13
Saturday

Idaho High Mountain Triathlon

Triathlon
Sep
13
Saturday

Pocatello Fall Ultra

Trail Run 20 km 60 km 100 km
Sep
20-21
Sa - Su

Idaho Mountain Trail Ultra Festival (IMTUF 100)

Trail Run 20 mi 100 mi
Sep
20
Saturday

Rexburg Rush Triathlon

Triathlon
Sep
20
Saturday

Race the Rocks

Trail Run 50 km
Sep
27
Saturday

Bogus 50/50

Trail Run 27 km 50 km 50 mi
Sep
30
Tuesday

Top of Tamarack

15 mi
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