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Ultra Marathons Found In Ontario

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Ultra Marathons in Ontario 2025 - 2026

The most comprehensive list of Ultra Marathons in and near Ontario in 2025 - 2026. Find your perfect race!

Race Calendar: Ultra Marathons Found In Ontario

Middle Path Trail Race

Peterborough County, ON
09 Aug 25
$34.62 - $131.73

Couch To a Voyageur

North Bay, ON
10 Aug 25
$74.58

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
$2.50 - $231.00

Share the Road Gran Fondo

Milton, ON
17 Aug 25
$56.20 - $245.02

Share the Road Gran Fondo 2025

Milton, ON
17 Aug 25
$56.71 - $247.33

The Runway 2025

Breslau, ON
30 Aug 25
Free - $51.26

Haliburton Forest Trail Race 2025

Haliburton, ON
06 Sep 25
Free - $223.43

Grey Highlands Gran Fondo

Markdale, ON
06 Sep 25
$97.16 - $182.27

The Mike Currie Memorial

Blenheim, ON
06 Sep 25
$29.23 - $50.81

Welland Canal Open Water Swim

Welland, ON
07 Sep 25
$104.75 - $131.73

Rodney Fair Road Race

Rodney, ON
14 Sep 25
Free - $40.02

The Wolfpack Ultra Championship

Hamilton, ON
20 Sep 25
$56.20 - $115.54

Monster of Mazinaw Trail Race 2025

Cloyne, ON
20 Sep 25
$83.94 - $105.72

Monarch Ultra 10km

Peterborough, ON
20 Sep 25
$23.83 - $72.38

Rotary Tour de Dundas Gran Fondo 2025

Dundas, ON
21 Sep 25
Free - $131.73

100KM MOVE

Oakville, ON
26 Sep 25
$75.00

Essex Region Conservation Bike Tour 2025

Kingsville, ON
27 Sep 25
$13.04 - $104.75

Run Off-the-Grid

Mattawan, ON
27 Sep 25
Free - $437.95

Tour d'Aldershot 2025

Burlington, ON
27 Sep 25
$30.07 - $57.90

BLUE BULLY ULTRA

Blue Mountains, ON
03 Oct 25
$30.00 - $389.00

9th Annual UMEI Lightning Bolt

Essex County, ON
04 Oct 25
$29.23 - $169.49

Manotick Backyard Ultra

Ottawa, ON
04 Oct 25
$24.03 - $89.39

TMMC Fall 5 KM Classic

Cambridge, ON
05 Oct 25
Free - $62.15

Run The Caves

Peterborough, ON
05 Oct 25
$13.04 - $100.28

Sticks n' Stones Trail Race 2025

Hamilton, ON
11 Oct 25
$73.05 - $274.57

Phoenix Trail Races

London, ON
18 Oct 25
$85.76

Wise Raven Trail Race

Waterloo, ON
18 Oct 25
$56.20 - $282.78

Long Sault Trail Race & Ultra

Bowmanville, ON
18 Oct 25
$18.58 - $111.18

The Bad Thing 2025

Auburn, ON
25 Oct 25

The Beav Trail Race 2025

Milton, ON
01 Nov 25
$89.39 - $132.96

Fat Ass Trail Run

Quinte West, ON
16 Nov 25
$51.26 - $83.94
Showing 1-32 of 32 results