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5K Race Calendar Ontario 2026-2027

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Explore the best 5k races in Ontario for 2026-2027! Our updated list features 247 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

July 2027
Jul
24
Sa

The 5K Foam Fest - London, ON

Race Roster Obstacle Run 5 km
The 5K Foam Fest - London, ON
August 2027
Aug
1
Su

Thousand Islands Triathlon & Runs

Triathlon Try a Tri (16+) 200 m 20 2.5 km Sprint 750 m 20 5 km Sprint 5 20 2.5 km Olympic 1500 m 40 km
Aug
7
Sa

The 5K Foam Fest - Ottawa

Race Roster Obstacle Run 5 km
The 5K Foam Fest - Ottawa
Aug
8
Su

The ENDURrun

Trail Run 5 km 5 mi ... 80 km 160 km
Aug
15
Su

Wooly Bully Races

5 km 10 km
Monthly updates for Ontario

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Aug
20-22
Fr - Su

Ottawa Spartan Event Weekend

Obstacle Run 5 km 10 km
Aug
22
Su

Nude Colour Fun Run 5K

5 km
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