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Ultra Marathons Found In Ontario in August
View all ↓Ultra Marathons in Ontario in August 2026
findarace.com is Canada's favourite event discovery site. Check out our list of August 2026 Ultra Marathons in Ontario below.
Race Calendar: Ultra Marathons Found In August
Persistence Backyard Ultra
Arva, ON
Sat 01 Aug 26
Bluewater International Gran Fondo 2026
Sarnia, ON
Sun 02 Aug 26
$93.18 - $217.73
The 2026 ENDURrun Sport 80 KM
Conestogo, ON
Sun 09 Aug 26
$51.26 - $356.26
Middle Path Trail Race
Peterborough County, ON
Sat 15 Aug 26
$23.83 - $110.15
2026 Gran Fondo Lake Huron
Southampton, ON
Sat 15 Aug 26
$69.64 - $185.53
Kawartha Lakes Classic Cycling Tour
Kawartha Lakes, ON
Sat 29 Aug 26
$115.00
The Runway 2026
Breslau, ON
Sat 29 Aug 26
Free - $56.71
Welland Canal Open Water Swim
Welland, ON
Sun 30 Aug 26
$105.72 - $132.96
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