Chase a personal best or a Boston Qualifier along a historic waterway at the St Lawrence Marathon on Saturday, April 25, 2026. This certified Boston-Qualifying event offers a full marathon starting at Crysler Marina at 7:00 AM, alongside a half-marathon, 10K, and 5K all starting from St. Lawrence College in Cornwall, Ontario. With tiered pricing that increases as spots fill, early registration is key to securing your preferred distance at the best possible rate.
The event welcomes runners of all ages and celebrates longevity, offering automatic discounts for youth and seniors, with free entry for participants 80 and over. Whether you're aiming for a marathon podium or a family-friendly 5K, this well-organized race provides a scenic and supportive atmosphere for achieving your running goals along the stunning St. Lawrence River.
Apr 25, 2026
Distance — 10km
Type — Others, Running
07:00
$34.93
Apr 25, 2026
Distance — 5km
Type — Others, Running
07:00
$34.93
Apr 25, 2026
Distance — 21km
Type — Others, Running
07:00
$62.15
Apr 25, 2026
Distance — 42km
Type — Others, Running
07:00
$83.94
These values represent the 3-year monthly averages for April in Cornwall.
Cornwall is a city of about 48,000 people (2018) on the St. Lawrence River in Eastern Ontario.
Read more launchExplore other exciting events happening in this same region.
location_on Pincourt, Quebec, CA
calendar_today May 03, 2026
location_on Merrickville, Ontario, CA
calendar_today Apr 25, 2026
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