Past race
Road

St. Lawrence Marathon 2025

Sat, Apr 26, 2025
Cornwall, Ontario

Hosted bySt. Lawrence Marathon

The St. Lawrence Marathon, formerly known as the "Cornwall Run to End MS," is a scenic and community-focused race series along the shores of the St. Lawrence River in Cornwall, Ontario. This sold-out springtime tradition attracts runners of all levels, offering flat, fast courses through tranquil waterfront pathways and historical settings.

Participants can choose from distances including Marathon, Half Marathon, 10K, and 5K, each providing a chance to experience local camaraderie, Boston Marathon qualifying standards for the full marathon, and a friendly, welcoming atmosphere.

Distances and events

42.2K
Marathon
Boston Qualifier
Sat, Apr 26 · 5:00 AM
$83.94
21.1K
Half Marathon
Sat, Apr 26 · 7:00 AM
$62.15
10K
10K Run
Sat, Apr 26 · 8:00 AM
$34.93
5K
St. Lawrence Marathon 5km
Fri, Apr 25 · 10:00 PM
$20
5K
5K Run
Sat, Apr 26 · 8:30 AM
$34.93

Prices from the organizer. Please check the official website for up-to-date times and pricing.

Highlights

Scenic waterfront courses along the St. Lawrence River
Boston Marathon qualifier for the full marathon
Certified course by Athletics Canada
Flat, mostly asphalt paths with slight net downhill
Community event with friendly atmosphere and local pride
Age-based discounts and free entry for seniors 80+
Sold-out, well-organized spring racing tradition

Course

Surface: Road
Location: Cornwall, Ontario

* Point-to-point marathon from Crysler Park Marina near Morrisburg to St. Lawrence College in Cornwall * Course follows bike path and paved pathways * First 2 km on dirt road, remainder mostly asphalt * Net downhill elevation profile, fast and flat * Certified by Athletics Canada * Multiple age group discounts * Stroller not allowed on all race distances

About the organizer

Organizer