The St. Lawrence River is one of the longest rivers in North America. And, is the outflow for the entire Great Lakes system. The Great Lakes hold nearly 20% of the world's fresh water.
The River flows 744 miles from Lake Ontario into the world's largest estuary, the Gulf of St. Lawrence. Only 114 miles of the River are located in New York State.
The River is 250 feet at its deepest point.
Flowing through both Canadian and US lands, the St. Lawrence River is a bi-national waterway, providing drinking water to local municipalities on both sides of the River and a vital tourism-based economy to local towns.
The St. Lawrence River has a discharge rate of 347, 849 cubic feet of water per second.
The Upper St. Lawrence is home to the Thousand Islands region. There are exactly 1,864. To be counted as an island, the piece of land must be surrounded by water, above water all year long, and support at least one tree.
For more information about the St. Lawrence River and Thousand Islands, visit:
- Seaway Trail - The Seaway Trail is a National Scenic By-Way that leads tourists along the many historic and natural features of the St. Lawrence River and Lake Ontario in New York state.
- Thousand Islands Photo Art - View the Thousand Islands with a birds-eye view through the photography of Ian Coristine.
- Thousand Islands Life - An on-line magazine devoted to the history and culture of the Thousand Islands region.
Beach Watch Weekly Report: Week 9
Save The River Reports on Week 9 of Beach Watch Program Clayton, NY (August 31, 2016) – Save The River’s Beach Watch Program is in the process of monitoring popular summer swimming locations on the River from July 5th through August 29th on a weekly basis. Save The River reports all samples collected on August 29th, […] read more
2016 Beach Watch: Week 7 Results
Save The River Reports on Week 7 of Beach Watch Program Clayton, NY (August 18, 2016) – Save The River’s Beach Watch Program is in the process of monitoring popular summer swimming locations on the River from July 5th through August 29th on a weekly basis. Save The River reports all samples collected on August […] read more
Water Quality to be Tested at Popular Swimming Areas
Save The River’s annual summer Beach Watch Program will begin July 5th and will run through August 29th. The program will provide weekly snapshots of water quality at popular swimming areas during the peak recreational swimming season. Sites to be tested include Wilson’s Beach in Cape Vincent, Potter’s Beach on Grindstone Island, Frink Dock in […] read more
On the 46th Earth Day the St. Lawrence is a Most Endangered River
This is wrong! It shouldn't be! And, it doesn't have to be! read more
Dr. Daniel Macfarlane, environmental historian, to speak on Plan 2014 at Winter Environmental Conference
His extensive knowledge of the history of the Seaway and dams that have caused ecological damage to wetland habitat and declines in key species will be very helpful as we approach the second anniversary of the referral of Plan 2014 read more
Save The River’s 27th Annual Winter Environmental Conference
Sewage, Oil, Microbeads - Oh my! Register now for the conference Saturday, February 6, 2016 read more
Wild & Scenic Film Festival at Clarkson University
Save The River & Clarkson University Present the Wild & Scenic Film Festival.Saturday, September 12, 2015. read more
DEC Advises Anglers to be Aware of Spawning Lake Sturgeon
The New York State Department of Environmental Conservation (DEC) today reminded anglers to be aware of spawning lake sturgeon in New York's Great Lakes waters, Great Lakes connecting channels, and in tributaries of the Great Lakes, St. Lawrence River, Finger Lakes and Oneida Lake. read more
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