• Lake Ontario. Region. Type. Maps & Charts (if available, no international). North America, Mid-West. Lake. Lake Ontario. 193 miles long. 283 feet deep.
  • The water from the four other lakes flows through Lake Ontario, which serves as an outlet to the Atlantic Ocean through the Saint Lawrence River.
  • Lake Ontario contains approximately 2,000 islands and 100 diverse beaches. Discover more outdoor destinations in Lake Ontario with Great Lakes Guide.
  • Water comes into Lake Ontario from Lake ERIE by means of the Niagara River and the Welland Canal, which was built to bypass the famous Niagara Falls.
  • The Great Lakes watershed is a region of high biodiversity, and Lake Ontario is important for its diversity of birds, fish, reptiles, amphibians, and plants.
  • Size: As one of the five Great Lakes, Lake Ontario spans an impressive surface area of about 7,340 square miles (19,000 square km).
  • The bottom of Lake Ontario is so cold that skyscrapers use it as a coolant for AC systems. Lake Ontario is one of the five Great Lakes of North America.
  • Lake Ontario is linked with the New York State Barge Canal at Oswego, N.Y., and with Lake Huron’s Georgian Bay via the Trent Canal at Trenton, Ont.
  • Lake Erie adjoins Lake Ontario, dumping into it through the Niagara River. Lake Ontario is fed by several rivers and creeks as well.
  • We are staying in grand island ny near the falls Is there anywhere neat to visit with my family at Lake Ontario that's not a long drive from where we are staying ?