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Half Marathon Calendar Ontario 2025-2026

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Explore the best half marathons in Ontario for 2025-2026! Our updated list features 45 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

March 2026
Mar
1
Sunday

Chilly Half Marathon

21 km
May 2026
May
3
Sunday

Georgina Spring Fling

5 km 10 km 21 km 42 km
May
3
Sunday

Toronto Marathon

5 km 10 km 21 km 42 km
May
23-24
Sa - Su

Tamarack Ottawa Race Weekend

5 km 10 km 21 km 42 km
August 2026
Aug
9
Sunday

The ENDURrun

Trail Run 10 km 15 km ... 30 km 42 km
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