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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 10 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

February 2026
Feb
1
Sunday

Winterlude Triathlon

Triathlon
May 2026
May
16
Saturday

Early Bird Triathlon & Run

Triathlon
June 2026
Jun
13
Saturday

Oak Ridges Moraine Adventure Relay

Multisport
July 2026
Jul
5
Sunday

IRONMAN 70.3 Muskoka

Triathlon
Jul
18-19
Sa - Su

Bluewater Triathlon

Triathlon
August 2026
Aug
2
Sunday

IRONMAN Canada-Ottawa

Triathlon
Aug
9
Sunday

Thousand Islands Triathlon & Runs

Triathlon 5 km 10 km 20 km 40 km
September 2026
Sep
5
Saturday

The Canadian Triathlon & Run

Triathlon
Sep
12
Saturday

Camp Tri

Triathlon
Sep
20
Sunday

Barrelman Niagara Falls

Triathlon
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