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Ultra Marathons Found In Ontario in Summer
View all ↓Ultra Marathons in Ontario in Summer 2025
findarace.com is Canada's favourite event discovery site. Check out our list of Summer 2025 Ultra Marathons in Ontario below.
Race Calendar: Ultra Marathons Found In Summer
Niagara Ultra 2025
Niagara-on-the-Lake, ON
21 Jun 25
EyeRide 2025
Vaughan, ON
21 Jun 25
$26.84 - $53.67
Run For the Kids 2025
Morpeth, ON
22 Jun 25
FitFarm Little Loop Ultra
Strathroy, ON
22 Jun 25
Free - $56.71
Summit 700 Trail Runs
Grey County, ON
05 Jul 25
$1.50 - $434.61
Cornwall Multisport Club - Kids Day 2025
Cornwall, ON
05 Jul 25
Free
BIG Gravel Grind
Thedford, ON
06 Jul 25
$153.66 - $175.44
The First Blaze Trail Race 2025
Milton, ON
12 Jul 25
The 2025 ENDURrun Sport 80 KM
Conestogo, ON
13 Jul 25
$45.82 - $329.03
2025 Lindsay Milk Run
Kawartha Lakes, ON
20 Jul 25
$23.83 - $61.59
Cornwall Multisport Club - Open Water Swim 2025
Cornwall, ON
25 Jul 25
$10.00
Tally in the Valley Trail Race 2025
Hamilton, ON
26 Jul 25
$78.50 - $241.89
Persistence Backyard Ultra
Arva, ON
02 Aug 25
Bluewater International Gran Fondo 2025
Sarnia, ON
03 Aug 25
$82.36 - $212.31
Middle Path Trail Race
Peterborough County, ON
09 Aug 25
$23.83 - $110.15
Couch To a Voyageur
North Bay, ON
10 Aug 25
$122.23
2025 Gran Fondo Lake Huron
Southampton, ON
16 Aug 25
$28.49 - $180.11
Mudskipper Canadian Individual SwimRun Championships and Parry Sound 15K Ultra Swim
Parry Sound, ON
17 Aug 25
$4.00 - $231.00
The Runway 2025
Breslau, ON
30 Aug 25
Free - $45.82
Showing 1-19 of 19 results