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Triathlon Calendar Ontario 2025-2026

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Explore the best triathlons in Ontario for 2025-2026! Our updated list features 30 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

July 2025
Jul
6
Sunday

IRONMAN 70.3 Muskoka

Triathlon
Jul
6
Sunday

Stonetown Triathlon

Triathlon
Jul
12
Saturday

Bracebridge

Triathlon
Jul
19-20
Sa - Su

Bluewater Triathlon

Triathlon
Jul
19
Saturday

Lakeshore Women's Triathlon

Triathlon
Jul
20
Sunday

K-Town

Triathlon
Jul
20
Sunday

Parry Sound Open Water SwimRun Challenge

Aquathlon
Jul
20
Sunday

Owen Sound Triathlon

Triathlon
Jul
27
Sunday

Toronto Triathlon Festival

Triathlon
August 2025
Aug
3
Sunday

IRONMAN Canada-Ottawa

Triathlon
Aug
9
Saturday

Run for Barrie

Triathlon
Aug
9
Saturday

Niagara Triathlon

Triathlon
Aug
10
Sunday

Thousand Islands Triathlon & Runs

Triathlon 5 km 10 km
Aug
10
Sunday

Beaton Classic

Multisport
Aug
10
Sunday

Treescape Chemong Lake Triathlon

Triathlon
Aug
16
Saturday

Toronto Island Race

Triathlon
Aug
17
Sunday

Mudskipper Canadian Individual SwimRun Championships

Aquathlon
Aug
17
Sunday

Red Shoes Triathlon

Triathlon
Aug
17
Sunday

Petawawa Triathlon

Triathlon
Aug
23
Saturday

Wasaga Beach

Triathlon
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