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Running calendar Ontario 2025-2026

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Explore the best running races in Ontario for 2025-2026! Our updated list features 119 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

July 2025
Jul
19-20
Sa - Su

Xterra Conquer the Crater

Trail Run 5 km 10 km 21 km 42 km
Jul
20
Sunday

Nude Colour Fun Run 5K

5 km
Jul
20
Sunday

K-Town

Triathlon
Jul
25
Friday

One More Hour

Backyard Ultra 6 km
August 2025
Aug
2
Saturday

Persistence Backyard Ultra

Backyard Ultra 6 km
Aug
3
Sunday

IRONMAN Canada-Ottawa

Triathlon
Aug
9-10
Sa - Su

Barrie

Triathlon
Aug
10
Sunday

Thousand Islands Triathlon & Runs

Triathlon
Aug
16-17
Sa - Su

Toronto Island Race

Triathlon
Aug
22
Friday

The Last Hour

Backyard Ultra 8 km
Aug
23
Saturday

Wasaga Beach

Triathlon
Aug
23
Saturday

Lines and Loops at Harold Town C.A.

Trail Run 6 km 18 km 30 km
Aug
24
Sunday

Calabogie Peaks Trail Run

Trail Run 10 km 21 km
Aug
30
Saturday

The Canadian Triathlon & Run

Triathlon
September 2025
Sep
1
Monday

Summer Shores 8K

5 km 8 km
Sep
6
Saturday

Camp Tri

Triathlon
Sep
6-7
Sa - Su

Lakeside

Triathlon
Sep
6-7
Sa - Su

Haliburton Forest Trail Race

Trail Run 12 km 26 km ... 50 mi 100 mi
Sep
7
Sunday

Xterra Sleeping Giant

Trail Run 5 km 10 km
Sep
7
Sunday

Georgina Marathon

5 km 10 km 21 km 42 km
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