Detroit Free Press Marathon
The only marathon to cross an international border, with runners crossing the Ambassador Bridge to Canada and returning through the Detroit-Windsor Tunnel — the world's only underwater international mile.
Course Type
Loop
Elevation Gain
130m
Typical Weather
Mid-October, 8-15°C (46-59°F), cool with possible wind off the river
What Makes This Race Special
- Only international border-crossing marathon
- Ambassador Bridge sunrise crossing
- Underwater international mile through tunnel
- US-Canada border experience
- Passport required
- Detroit River views