Lake Ontario: Filled by the Falls, Fed by Erie

Memorial Day, 2025, on Lake Ontario, just downstream from Niagara Falls.

All that water—quiet, cold, and impossibly deep.

It fills Lake Ontario to the brim. And where does it come from?

Mostly from Niagara Falls.

In fact, nearly 85% of Lake Ontario’s water flows through the Niagara River, carried over from Lake Erie in one long, thundering drop.

The rest comes from rivers, rain, and runoff—but it’s Erie and the Falls that give Ontario her power.

As Gordon Lightfoot once sang in The Wreck of the Edmund Fitzgerald:

“That good ship and true was a bone to be chewed /

When the gales of November came early… /

And later that night, when her lights went out of sight /

Came the wreck of the Edmund Fitzgerald…”

“Lake Ontario takes in what Lake Erie can send her…”

So next time you look out across that wide, endless blue—

Remember, it’s Niagara’s water. Erie’s gift. A river’s relentless journey.

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