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TBA

St Lawrence Marathon

Last run April 2026Date TBA

Cornwall, Ontario

42km21km10km5km
Organizer page ↗Date TBARegistration happens on the organizer's site.

No date announced yet — what we know

  • Last held Saturday, April 25, 2026 — the last Saturday in April.
  • Distances last time 42km, 21km, 10km, 5km
  • Start St. Lawrence College, Cornwall, ON, Canada

RaceFinder re-reads the organizer's listing every morning. Nothing on this page is a confirmed 2027 date — the box under this one sends a single email the day one appears.

Get one email when the next edition is announced

Otherwise: literally one email about this race, then we forget you.

About this race

The St Lawrence Marathon - marathon, half-marathon, 10K and 5K run. We're a certified Boston-Qualifier.

— from the organizer's listing, read it in full

Next edition TBA

This race runs annually (last edition: April 25, 2026). The next date hasn't been announced — watch the organizer's page.

Organizer page ↗

Listed via Race Roster. RaceFinder links you to the official page — always confirm date and details with the organizer. Your race? Update or claim this listing free →

Distances last time

  • Marathon

    42.2km *Boston Qualifier*

  • 10K Run
  • Half-Marathon

    21.1km

  • 5K Run

Distances and details from the last edition's listing. Entry fees aren't shown because the next edition hasn't been priced yet.

Where

Directions ↗

St. Lawrence College, Cornwall, ON, Canada — 2 St. Lawrence Drive

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