Which river connects Lake Erie to Lake Ontario?

The Niagara River connects Lake Erie to Lake Ontario.

The river flows north for about 58 kilometres from the eastern end of Lake Erie to Lake Ontario. Along the way, it plunges over Niagara Falls, whose three sections include Horseshoe Falls, American Falls and Bridal Veil Falls. The river then continues through the Niagara Gorge before reaching Lake Ontario.

Niagara is part of the Great Lakes–St. Lawrence system, which ultimately carries water from the upper Great Lakes to the Atlantic Ocean. The river also forms part of the international boundary between Ontario, Canada, and New York, United States.

A frequent mix-up is the Welland Canal. It also links the two lakes for ships, but it is an engineered canal that bypasses Niagara Falls, not the river named in the question. The Detroit River, by contrast, connects Lake St. Clair with Lake Erie, while the St. Lawrence River carries water eastward from Lake Ontario.