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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

The Foxtail Rail Trail Race (Paul Turkstra Memorial) 2025

Dundas, ON
19 Apr 25

Pick Your Poison Trail Run 2025

Barrie, ON
26 Apr 25

Bumrun Toronto 2025

Toronto, ON
27 Apr 25
$13.04 - $72.38

The Rugged Raccoon Night Race 2025

St. Marys, ON
03 May 25
$78.50 - $111.18

Conquer The Canuck

Cambridge, ON
10 May 25
$104.75 - $352.92

Coach D's Backyard Ultra and Trail Race

Kawartha Lakes, ON
17 May 25
$88.57 - $164.10

Sulphur Springs Trail Race 2025

Hamilton, ON
24 May 25
Free - $838.45

Spin the Lakes

Huntsville, ON
24 May 25
$110.15

Baden Running Races 2025

Baden, ON
25 May 25
Free - $61.07

H+P THIS MAY BE LOOPY ULTRA

Waterloo, ON
31 May 25
Free

2025 Forest City Cycling Challenge

London, ON
01 Jun 25
$104.75 - $131.73

Rainbow Trail Run 2025

Simcoe County, ON
14 Jun 25
Free - $122.07

Waterloo 10 KM Classic 2025

Waterloo, ON
14 Jun 25
Free - $83.94

Tanya's Ride for Brain Injury

Palgrave, ON
14 Jun 25
$7.64

Couch To a Voyageur

North Bay, ON
15 Jun 25
$130.23

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
$23.83 - $56.20

FitFarm Little Loop Ultra

Strathroy, ON
22 Jun 25
$23.83 - $56.71

Summit 700 Trail Runs

Grey County, ON
05 Jul 25
$1.50 - $380.46

Cornwall Multisport Club - Kids Day 2025

Cornwall, ON
05 Jul 25
Free

BIG Gravel Grind

Thedford, ON
06 Jul 25
$131.87 - $153.66

The First Blaze Trail Race 2025

Milton, ON
12 Jul 25
$78.50 - $122.07

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 - $50.81

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
$73.05 - $220.10

Persistence Backyard Ultra

Arva, ON
02 Aug 25

Bluewater International Gran Fondo 2025

Sarnia, ON
03 Aug 25
$82.36 - $158.16

Middle Path Trail Race

Peterborough County, ON
09 Aug 25
$23.83 - $110.15

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 - $214.65

Haliburton Forest Trail Race 2025

Haliburton, ON
06 Sep 25
Free - $223.43

Grey Highlands Gran Fondo

Markdale, ON
06 Sep 25
$75.89 - $139.72

Welland Canal Open Water Swim

Welland, ON
07 Sep 25
$99.36 - $120.94

The Wolfpack Ultra Championship

Hamilton, ON
20 Sep 25
$56.20 - $115.54

Monster of Mazinaw Trail Race 2025

Cloyne, ON
20 Sep 25
$78.50 - $100.28

Monarch Ultra 10km

Peterborough, ON
20 Sep 25
$23.83 - $72.38

Rotary Tour de Dundas Gran Fondo 2025

Dundas, ON
21 Sep 25
$29.23 - $131.73

BLUE BULLY ULTRA

Blue Mountains, ON
03 Oct 25
$30.00 - $445.00
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