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Running Calendar Ontario 2025-2026

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Explore the best running races in Ontario for 2025-2026! Our updated list features 197 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

Half Marathons Marathons Trail Runs Triathlons
June 2026
Jun
13
Sa

Run for Women - London
5 km 10 km
Jun
13
Sa

Boomerang Trail Run
Trail Run 2 hr 4 hr 6 hr
Jun
13
Sa

Oak Ridges Moraine Adventure Relay
Multisport
Jun
13
Sa

Buttertart Trot
5 km 10 km Half Marathon
Jun
13-14
Sa - Su

Gravenhurst
Triathlon
Jun
14
Su

Kawartha Sun Run
5 km 10 km Half Marathon
Jun
14
Su

Northumberland Run Forest Run
Trail Run 3 km 8 km 9 km 25 km
Jun
20
Sa

Waterloo 10 KM Classic
3 km 5 km ... 10 km 15 km
Jun
20
Sa

The Whole Enchilada
Trail Run 4 km 8 km 25 km 50 km
Jun
20
Sa

Community Strong Race
5 km 10 km Half Marathon Marathon
Jun
20
Sa

The Sunburn Solstice Trail Run
Trail Run 4 km
Jun
21
Su

Stouffville Main Street 5K
5 km
Jun
21
Su

Run for Women - Whitby
5 km 10 km
Jun
21
Su

Bronte Harbour Classic 5K
5 km
Jun
21
Su

Solstice 5K - Toronto
5 km
Jun
21
Su

Solstice 5K - Ottawa
5 km
Jun
27
Sa

Sarnia Sole Burner
Backyard Ultra 5 km 3 hr 6 hr
Jun
27-28
Sa - Su

Utopia Backyard Ultra
Backyard Ultra 7 km 6 hr 12 hr 24 hr
Jun
27-28
Sa - Su

Rose City
Triathlon
July 2026
Jul
1
We

Canada Day Barrie
5 km