0005

Marathons Found In Ontario in May

View all ↓

Marathons in Ontario in May 2026

findarace.com is Canada's favourite event discovery site. Check out our list of May 2026 Marathons in Ontario below.

Race Calendar: Marathons Found In May

2026 Toronto Marathon

Toronto, ON
Sun 03 May 26

Georgina Spring Fling 2026

Georgina, ON
Sun 03 May 26
$75.54 - $171.38

Marathons For Mental Health 5k/10k Race

London, ON
Sun 24 May 26
$85.33

SudburyROCKS 2026

Greater Sudbury, ON
Sun 24 May 26
Free - $520.16

Marathon for mental health and addiction

Mount Forest, ON
Sat 30 May 26
Free
Showing 1-5 of 5 results