Running calendar Ontario 2025-2026

Sep

13-14

Sa - Su

Tough Mudder - Toronto

Toronto, Ontario

Obstacle Run 5 km 15 km

Sep

13

Saturday

Sugarbush Shenanigans

Prince Edward, Ontario

Backyard Ultra 6 hr 12 hr 24 hr

Sep

14

Sunday

Windsor Waterfront Half Marathon

Windsor, Ontario

5 km 21 km

Sep

14

Sunday

Barrelman Niagara Falls

Niagara Falls, Ontario

Triathlon

Sep

21

Sunday

Canada Army Run

Ottawa, Ontario

5 km 10 km 21 km

Sep

26

Friday

Brita Night Run - Toronto

Toronto, Ontario

5 km 10 km

Sep

28

Sunday

Railway City Road Races - St. Thomas Ontario Half Marathon, 10 km, 5 km run and 5 km walk, 1 km for the kids

St. Thomas, Ontario

5 km 10 km 21 km

Sep

28

Sunday

Oakville Half Marathon

Oakville, Ontario

5 km 10 km 21 km

Oct

5

Sunday

Muskoka Marathon

Bracebridge, Ontario

5 km 10 km 21 km 42 km

Oct

12

Sunday

Fall Colours Run

Ottawa, Ontario

3 km 5 km ... 21 km 42 km

Oct

18-19

Sa - Su

Blue Mountain Spartan Trifecta Weekend

The Blue Mountains, Ontario

Obstacle Run 5 km 10 km 21 km

Oct

18-19

Sa - Su

Toronto Waterfront Marathon

Toronto, Ontario

5 km 21 km 42 km

Oct

18

Saturday

Phoenix Trail Races

London, Ontario

Trail Run 25 km 50 km

Oct

19

Sunday

Art In Motion 10K

Woodbridge, Ontario

5 km 10 km

Oct

25

Saturday

5 Peaks Cider Run

Uxbridge, Ontario

Trail Run 7 km 14 km 21 km

Oct

26

Sunday

Niagara Falls Marathon

Niagara Falls, Ontario

5 km 10 km 21 km 42 km

Nov

1-2

Sa - Su

Hamilton Marathon Road2Hope

Hamilton, Ontario

5 km 10 km 21 km 42 km

Nov

15

Saturday

The Leftovers Mystery Race

Dundas, Ontario

Trail Run 6 km 15 km 25 km

Dec

26

Friday

Boxing Day Run - Hamilton

Hamilton, Ontario

4 mi 10 mi