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Ultra Marathons Found In Ontario in Summer
View all ↓Ultra Marathons in Ontario in Summer 2026
findarace.com is Canada's favourite event discovery site. Check out our list of Summer 2026 Ultra Marathons in Ontario below.
Race Calendar: Ultra Marathons Found In Summer
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
SOO 200
Goulais River, ON
Fri 11 Sep 26
$245.00 - $1,895.00
Grey Highlands Gran Fondo 2026
Markdale, ON
Sat 12 Sep 26
$12.06 - $182.27
Haliburton Forest Trail Race 2026
Haliburton, ON
Sat 12 Sep 26
Free - $293.82
Monster of Mazinaw Trail Race 2026
Cloyne, ON
Sat 19 Sep 26
$78.50 - $105.72
Monarch Ultra 10km
Peterborough, ON
Sat 19 Sep 26
$23.83 - $77.77
Share the Road Gran Fondo 2025
Milton, ON
Sun 20 Sep 26
$56.71 - $274.57
Share the Road Gran Fondo 2026
Milton, ON
Sun 20 Sep 26
$137.12
Rodney Fair Road Race
Rodney, ON
Sun 20 Sep 26
Free - $40.02
BLUE BULLY ULTRA
Blue Mountains, Grey
Fri 25 Sep 26
Free
BLUE BULLY ULTRA
Blue Mountains, ON
Fri 25 Sep 26
$30.00 - $350.00
10th Annual UMEI Lightning Bolt
Essex County, ON
Sat 26 Sep 26
$29.23 - $169.49
Run Off-the-Grid
Mattawan, ON
Sat 26 Sep 26
Free - $459.73
Essex Region Conservation Bike Tour 2026
Kingsville, ON
Sat 26 Sep 26
$13.04 - $104.75
2026 Great Lakes to Greenbelt Farm Fresh Ride – featuring one day Pedalling and one day Paddling
Hamilton, ON
Sat 26 Sep 26
$40.18 - $126.10
Rotary Tour de Dundas Gran Fondo 2026
Dundas, ON
Sun 27 Sep 26
$29.23 - $131.73
Showing 1-23 of 23 results