Idaho Triathlon Calendar 2025-2026

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Explore the best triathlons in Idaho for 2025-2026! Our updated list features 52 exciting races across the region. Find your next race in Idaho below and join the running community at these great events!

July 2026
Jul
18
Saturday

Goose Creek Run-off

5 km 10 km
Jul
24-26
Fr - Su

Standhope Ultra Challenge

Trail Run 30 km 60 km 100 mi
Jul
25
Saturday

Idaho Falls Marathon

5 km 13 mi 26 mi
Jul
25-26
Sa - Su

Standhope 100

Trail Run 100 mi
Jul
25
Saturday

Ironman 70.3 Boise

Triathlon
August 2026
Aug
8-9
Sa - Su

Boise Spartan Trifecta Weekend

Obstacle Run 5 km 10 km Half Marathon
Aug
8
Saturday

Coeur d'Alene Triathlon

Triathlon
Aug
29
Saturday

Pocatello Marathon

3 mi 6 mi 13 mi 26 mi
Aug
30
Sunday

Priest Lake Triathlon

Triathlon
September 2026
Sep
5
Saturday

Salmon Marathon

Half Marathon Marathon
Sep
12
Saturday

Jen McKenna Paddle and Run

Multisport
Sep
19
Saturday

Priest Lake Marathon

Marathon
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