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Half Marathon Calendar Ontario 2025-2026

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Monthly updates for Ontario

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Explore the best half marathons in Ontario for 2025-2026! Our updated list features 38 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

February 2026
Feb
15
Su

Embrace Winter Run

3 km 5 km ... Half Marathon Marathon
April 2026
Apr
25
Sa

Merrickville Heritage Classic

5 km 10 km Half Marathon
Apr
25-26
Sa - Su

Limestone Race Weekend

5 km 10 km Half Marathon
Apr
26
Su

Beneva Mississauga Marathon

5 km 10 km Half Marathon Marathon
May 2026
May
2
Sa

5 Peaks - Kelso

Trail Run Half Marathon
May
3
Su

Spring Fling Marathon

5 km 10 km Half Marathon Marathon
May
3
Su

Toronto Marathon

5 km 10 km Half Marathon Marathon
May
23-24
Sa - Su

Tamarack Ottawa Race Weekend

5 km 10 km Half Marathon Marathon
May
30
Sa

Pelee Island Half Marathon

Half Marathon
June 2026
Jun
6
Sa

Rotary Huron Shore Run

5 km 10 km Half Marathon
Jun
7
Su

Waterfront Run Barrie

5 km 10 km Half Marathon
Jun
13
Sa

Buttertart Trot

5 km 10 km Half Marathon
Jun
13
Sa

Look Out Trail Race

Trail Run 7 km 14 km Half Marathon
Jun
14
Su

Kawartha Sun Run

5 km 10 km Half Marathon
Jun
20
Sa

Community Strong Race

5 km 10 km ... Marathon 61 km
Jun
20
Sa

Niagara Ultra

10 km Half Marathon ... 50 km 80 km
July 2026
Jul
11
Sa

Summit 700 Trail Runs

Trail Run 5 km 10 km Half Marathon 50 km
Jul
13
Mo

The ENDURrun Prelim

Trail Run 3 km 8 km 10 km Half Marathon
Jul
18-19
Sa - Su

Xterra Conquer the Crater

Trail Run 3 km 5 km ... Half Marathon Marathon
Jul
25
Sa

Tally in the Valley Trail Race

Trail Run 7 km Half Marathon ... 100 mi 24 hr