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

February 2025
Feb
16
Sunday

Embrace Winter Run

3 km 5 km ... 21 km 42 km
March 2025
Mar
2
Sunday

Chilly Half Marathon

21 km
April 2025
Apr
27
Sunday

Beneva Mississauga Marathon

5 km 10 km 21 km 42 km
May 2025
May
4
Sunday

Toronto Marathon

5 km 10 km 21 km 42 km
May
4
Sunday

Georgina Spring Fling

5 km 10 km 21 km 42 km
May
24-25
Sa - Su

Tamarack Ottawa Race Weekend

5 km 10 km 21 km 42 km
June 2025
Jun
1
Sunday

Waterfront Run Barrie

5 km 10 km 21 km
Jun
8
Sunday

Forest City Road Races

5 km 10 km 21 km
Jun
21
Saturday

Niagara Ultra

10 km 21 km 42 km 50 km
Jun
21-22
Sa - Su

Community Strong Race

5 km 10 km 21 km 42 km
Jun
22
Sunday

Kawartha Sun Run

5 km 10 km 21 km
July 2025
Jul
5
Saturday

Summit 700 Trail Runs

Trail Run 5 km 10 km 21 km 50 km
Jul
19-20
Sa - Su

Xterra Conquer the Crater

Trail Run 5 km 10 km 21 km 42 km
August 2025
Aug
24
Sunday

Calabogie Peaks Trail Run

Trail Run 10 km 21 km
September 2025
Sep
7
Sunday

Georgina Marathon

5 km 10 km 21 km 42 km
Sep
14
Sunday

Windsor Waterfront Half Marathon

5 km 21 km
Sep
21
Sunday

Canada Army Run

5 km 10 km 21 km
Sep
28
Sunday

Oakville Half Marathon

5 km 10 km 21 km
Sep
28
Sunday

Railway City Road Races - St. Thomas Ontario Half Marathon, 10 km, 5 km run and 5 km walk, 1 km for the kids

5 km 10 km 21 km
October 2025
Oct
5
Sunday

Muskoka Marathon

5 km 10 km 21 km 42 km
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