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Marathons Found In Ontario in May

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Marathons in Ontario in May 2025

findarace.com is Canada's favourite event discovery site. Check out our list of May 2025 Marathons in Ontario below.

Race Calendar: Marathons Found In May

2025 Toronto Marathon

Toronto, ON
04 May 25

Georgina Spring Fling 2025

Georgina, ON
04 May 25
$75.54 - $171.38

Run and Roll

Leamington, ON
04 May 25
$32.03

Marathons For Mental Health 5k/10k Race

London, ON
24 May 25
$50.81 - $72.38

SudburyROCKS 2025

Greater Sudbury, ON
25 May 25
Free - $433.84
Showing 1-5 of 5 results