St Lawrence Marathon 2026

This page is kept as a past race archive for the Apr 25, 2026 edition in Cornwall, ON. Use the links below to find upcoming races in the same area or distance category. You can also browse the 2026 race calendar.

The St. Lawrence Marathon takes place each April in Cornwall, Ontario — the 2026 edition is scheduled for April 25. The race has been held in the spring since at least 2002 and is run by a local volunteer committee made up of long-time area runners and community organizers.

The event offers a full marathon plus a half-marathon, 10 km and 5 km distances. Marathon runners board shuttle buses from St. Lawrence College to the Crysler Park Marina start (buses run in the early morning), with the marathon gun typically at 7:00 a.m., the half at 9:00 a.m., and the 10 km and 5 km starting later in the morning. An awards ceremony follows mid-day and the finish area closes in the early afternoon.

What sets St. Lawrence apart is the waterfront routing: the marathon follows the St. Lawrence River and sections of the Great Lakes Waterfront Trail before finishing on the St. Lawrence College campus. The event functions as a community festival — local sponsors and volunteers support on-course logistics, and finishers receive a commemorative t-shirt, swag and a special-edition finisher’s medal. Race-day amenities include post-race refreshments in the college gymnasium, access to change rooms, and ample complimentary parking at the college.

Registration for the 2026 race is open; runners can sign up in advance and should note race-kit pickup windows are scheduled at a local hotel the day before and the day of the race (marathon runners are required to pick up kits during the posted times).

• Marathon start at Crysler Park Marina; finish on the St. Lawrence College campus in Cornwall
• Half, 10 km and 5 km start and finish at St. Lawrence College
• Route follows the St. Lawrence River and sections of the Great Lakes Waterfront Trail
• Race day shuttle buses run from St. Lawrence College to the marathon start (early-morning departures)
• Ample complimentary parking available in the east lot at St. Lawrence College (near Aultsville Theatre)

• Boston-qualifier course: Marathon is certified as a Boston-qualifying route that runs along the St. Lawrence River
• Waterfront scenery: Course uses stretches of the Great Lakes Waterfront Trail for scenic river views
• Shuttle to marathon start: Early morning buses transport marathon runners from St. Lawrence College to Crysler Park Marina
• Finish-line amenities: Post-race refreshments and access to college change rooms and showers in the gymnasium
• Finisher kit & swag: All finishers receive a special-edition medal plus a commemorative t-shirt and event swag