Races Marathon · Toronto, Canada
Toronto Waterfront Marathon
Toronto Waterfront Marathon is a flat marathon in Toronto, Canada, held each October. Canada's fastest big-city course — long flat stretches along Lake Ontario with only a gentle Bay Street rise near the finish. Roughly two-thirds of Canadian Boston qualifiers are earned here. Mid-October is reliably cool, 5-14C — near-perfect racing weather. The Toronto Waterfront Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Last updated 2026-07-03 · confirm dates & entries on the official race site
When
October
every year
Course
flat
Marathon
Conditions
Mid-October is reliably cool, 5-14C — near-perfect racing weather.
Racing this course well
Canada's fastest big-city course — long flat stretches along Lake Ontario with only a gentle Bay Street rise near the finish. Roughly two-thirds of Canadian Boston qualifiers are earned here.
The Toronto Waterfront Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Pick your goal for Toronto
Pace charts, weekly structure and timelines for the most common marathon goals:
Asked often
- When is the Toronto Waterfront Marathon?
- It is held each October in Toronto, Canada. Check the official Toronto Waterfront Marathon site for the exact date and entry windows.
- Is the Toronto Waterfront Marathon course flat?
- Canada's fastest big-city course — long flat stretches along Lake Ontario with only a gentle Bay Street rise near the finish. Roughly two-thirds of Canadian Boston qualifiers are earned here.
- How should I train for the Toronto Waterfront Marathon?
- Build for the course you'll actually race at the Toronto Waterfront Marathon: flat terrain, October conditions. RunV generates a plan for your goal time and rebuilds it every time life interrupts the Toronto build.
Not sure what to target? Predict your marathon time from a recent race →
More marathon races
Build for Toronto — around your actual life
RunV engineers your block backwards from race day in October — and rebuilds it every time training doesn't go to script.
