St. Lawrence River
Draining Lake Ontario, the St. Lawrence threads the Thousand Islands past Clayton and Alexandria Bay, then forms the New York-Ontario border past Ogdensburg and Massena before crossing Quebec to the Atlantic.
Course of the river, simplified. Map data from Natural Earth (public domain).
Weather at the St. Lawrence River (National Weather Service) ↗
River facts
| Length | 310 miles |
|---|---|
| Source | Outlet of Lake Ontario near Kingston, Ontario and Cape Vincent, New York |
| Mouth | Gulf of St. Lawrence, Quebec |
| State | New York |
The St. Lawrence Seaway's locks and canals, opened in 1959, carry ocean ships upriver.
Boat ramps, launches and bait shops
Detailed ramp, bait shop and lock-and-dam listings for the St. Lawrence River are coming soon. Until then, these searches open Google Maps along the river:
- Boat ramps on the St. Lawrence River in New York ↗ · Bait shops near the St. Lawrence River in New York ↗
Fishing regulations
Check the state agency for river-specific rules, seasons and limits before you fish:
Facts from St. Lawrence River (Wikipedia) ↗