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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 184 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

July 2025
Jul
21
Monday

Soo 200

Trail Run 200 mi
Jul
25
Friday

One More Hour

Backyard Ultra 6 km
Jul
26
Saturday

Toronto Carnival Run

5 km 10 km
Jul
27
Sunday

Toronto Multisport Festival

Multisport
August 2025
Aug
2
Saturday

Persistence Backyard Ultra

Backyard Ultra 6 km
Aug
3
Sunday

IRONMAN Canada-Ottawa

Triathlon
Aug
4
Monday

Shore to Shore Road Race

13 km
Aug
9
Saturday

Barrie

Triathlon
Aug
10
Sunday

Thousand Islands Triathlon & Runs

Triathlon
Aug
10
Sunday

Xterra Sleeping Giant

Trail Run 5 km 10 km 25 km
Aug
16
Saturday

Toronto Island Race

Triathlon
Aug
16
Saturday

Mapleton Sunflower Run

5 km 10 km
Aug
16
Saturday

Tim Horton's Night Run

5 km
Aug
17
Sunday

Kakabeka Falls Half Marathon

8 km 21 km
Aug
17
Sunday

Mudskipper Canadian Individual SwimRun Championships

Aquathlon
Aug
22
Friday

The Last Hour

Backyard Ultra 8 km
Aug
22-24
Fr - Su

Ottawa Spartan Event Weekend

Obstacle Run 5 km 10 km 4 hr 12 hr
Aug
23
Saturday

Lines and Loops at Harold Town C.A.

Trail Run 6 km 18 km 30 km
Aug
23
Saturday

Wasaga Beach

Triathlon
Aug
23
Saturday

SuperPower - Toronto

5 km 10 km
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