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Indiana Triathlon Calendar 2025-2026

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Monthly updates for Indiana

Get new running races (and updates) in your inbox every month.

Explore the best triathlons in Indiana for 2025-2026! Our updated list features 21 exciting races across the region. Find your next race in Indiana below and join the running community at these great events!

May 2026
May
2
Sa

CIA Central Indiana Adventure Race

Multisport
May
9
Sa

Thunder in the Valley

Triathlon
May
17
Su

Muncie Triathlon - USAT State Championship

Triathlon
May
23
Sa

Fox Island Triathlon

Triathlon
June 2026
Jun
6-7
Sa - Su

Leon's Triathlon

Triathlon
Jun
6
Sa

Clear Lake Triathlon - Indiana

Triathlon
Jun
7
Su

Mudskipper US Swimrun Indiana

Aquathlon
Jun
26-27
Fr - Sa

Indiana Sports Corp Corporate Challenge

Multisport
Jun
27
Sa

Ideal Beach Triathlon

Triathlon
Jun
27
Sa

Warsaw Optimist Triathlon

Triathlon
July 2026
Jul
11
Sa

Ironman 70.3 Muncie

Triathlon
Jul
11
Sa

La Porte Triathlon

Triathlon
Jul
19
Su

Huntington 1/2 Iron

Triathlon
August 2026
Aug
1
Sa

DINO Gravel Triathlon

Triathlon
Aug
8
Sa

Lake Max Triathlon

Triathlon
Aug
8
Sa

Rock the Quarry Triathlon

Triathlon
Aug
15
Sa

Fox Island Triathlon #2

Triathlon
Aug
30
Su

Geist Waterfront Triathlon

Triathlon
September 2026
Sep
12
Sa

Mighty Mississinewa Triathlon

Triathlon
Sep
27
Su

US Swimrun Championships - Indiana

Aquathlon