St. Lawrence River

Great Lakes outlet

The St.

Lawrence River flows from the Great Lakes to the Atlantic Ocean, forming part of the border between the United States and Canada.

It's one of North America's major waterways, central to shipping and trade since European colonization.

The St.

Lawrence Seaway, completed in 1959, allows oceangoing vessels to reach the Great Lakes.

Opposites
water body type

St. Lawrence RiverGreat Lakes

Five connected inland seas

Lake Ontario · lake · pond · reservoir · Caspian Sea

directional flow/regional pairing

St. Lawrence RiverColumbia River

Major Pacific Northwest river

Colorado River · Mississippi River · Rio Grande · Missouri River · Yukon River

geographic scale and reach

St. Lawrence Rivercreek

Narrow natural watercourse

brook · stream · rivulet · trickle · drainage ditch

Family

river, Lawrence

Familiarity
Top 500,000
Profile
Mostly American · Timeless · Concrete · Everyday, not technical · Rated G