Idaho Triathlon Calendar 2025-2026

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Explore the best triathlons 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!

June 2025
Jun
22
Sunday

Mary Lou Triathlon

Triathlon
Jun
28
Saturday

Rigby Lake Run

5 km
Jun
28
Saturday

Dirty Dog Trail Marathon and Half Marathon

Trail Run 13 mi 26 mi
Jun
28
Saturday

Gift of Life Walk/Run

July 2025
Jul
4
Friday

Buhl Fun Run

5 km 10 km
Jul
12
Saturday

Hayden Sprint Triathlon

Triathlon
Jul
12
Saturday

Rigby Lake Rumble Triathlon

Triathlon
Jul
12
Saturday

Beaverhead Endurance Runs 100K

Trail Run 55 km 100 km
Jul
12
Saturday

Mccall Trailrunning Classic

Trail Run 30 km 50 km
Jul
19
Saturday

Mesa Falls Marathon

5 km 10 km 13 mi 26 mi
Jul
19
Saturday

Goose Creek Run-off

5 km 10 km
Jul
19
Saturday

Tin Cup Challenge

5 km 10 km
Jul
25-27
Fr - Su

Standhope 100

Trail Run 100 mi
Jul
25-27
Fr - Su

Standhope Ultra Trail

Trail Run 30 km 60 km 100 mi
Jul
26
Saturday

Idaho Falls Marathon

5 km 13 mi 26 mi
Jul
26
Saturday

Ironman 70.3 Boise

Triathlon
Jul
26
Saturday

Baby Foot 5K

August 2025
Aug
2
Saturday

Boise Front Trail Run

Trail Run 5 mi 10 mi
Aug
2
Saturday

Farm Life 5k Trail Run

Trail Run Obstacle Run 5 km
Aug
9
Saturday

Coeur d'Alene Triathlon

Triathlon
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