Ontario close

Running calendar Ontario 2025-2026

Header image

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!

August 2025
Aug
24
Sunday

Calabogie Peaks Trail Run

Trail Run 10 km 21 km
Aug
24
Sunday

Cornwall Triathlon

Triathlon
Aug
30
Saturday

The Canadian Triathlon & Run

Triathlon
Aug
30
Saturday

North of 7 Challenge

Obstacle Run 3 km 2 hr
September 2025
Sep
1
Monday

Summer Shores 8K

5 km 8 km
Sep
1
Monday

Island Lake Classic

5 km 10 km
Sep
6-7
Sa - Su

Haliburton Forest Trail Race

Trail Run 12 km 26 km ... 50 mi 100 mi
Sep
6
Saturday

Lakeside

Triathlon
Sep
6
Saturday

Camp Tri

Triathlon
Sep
7
Sunday

Georgina Marathon

5 km 10 km 21 km 42 km
Sep
7
Sunday

Don Doan Dash

5 km 10 km
Sep
7
Sunday

Constantine Yorkville Run

5 km
Sep
13-14
Sa - Su

Tough Mudder - Toronto

Obstacle Run 5 km 15 km
Sep
13
Saturday

Sugarbush Shenanigans

Backyard Ultra 6 hr 12 hr 24 hr
Sep
13
Saturday

Oasis ZooRun Toronto

5 km 10 km
Sep
13
Saturday

Ajax Race Weekend

5 km 10 km 21 km
Sep
13
Saturday

Cornwall Multisport Club - Fall Duathlon

Duathlon
Sep
14
Sunday

Windsor Waterfront Half Marathon

5 km 21 km
Sep
14
Sunday

Barrelman Niagara Falls

Triathlon
Sep
20
Saturday

That Dam Hill

5 km 42 km ... 12 hr 24 hr
Articles
Mizuno Wave Rider 28: Elevating the Legacy of a Running Icon
Garmin Forerunner Review: Garmin Forerunner Series
Stride with Confidence: A Comprehensive Guide to Saucony Running Shoes
Essential Running Form Techniques for Enhanced Performance and Injury Prevention