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Ultra Marathons Found In Ontario

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Ultra Marathons in Ontario 2026 - 2027

The most comprehensive list of Ultra Marathons in and near Ontario in 2026 - 2027. Find your perfect race!

Race Calendar: Ultra Marathons Found In Ontario

The Bad Thing 2026

Auburn, ON
Sat 24 Oct 26

Trick or Trot 2026

Waterloo, ON
Sat 31 Oct 26
Free - $51.26

Horseshoe Valley Hustle Trail & Ultra Challenge

Barrie, ON
Sat 31 Oct 26
$8.00 - $216.49

The Beav Trail Race 2026

Milton, ON
Sat 31 Oct 26

The Beav Trail Race 2026

Milton, ON
Sat 07 Nov 26

Fat Ass Trail Run

Quinte West, ON
Sun 15 Nov 26
$59.56 - $87.21
Showing 1-6 of 6 results