When
May 29, 2027
Weather
Last Year's Race Weather
🌦️ Drizzle · 8°C–20°C
· Wind 30 km/h
Registration
Open Now
Opened July 5, 2026, Until Full
Website
Official website →
Event Details
The Tamarack Homes Ottawa International Marathon is a World Athletics Elite Label Race, attracting elite athletes from around the world. The 2027 edition is scheduled for May 29, 2027.
Event type
Full-Marathon
Distance
42.2 km
Surface
Road
Registration opens
July 5, 2026
, Until Full
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