Niagara Falls is not just tall, it is also very deep : the water in the river just below the main falls reaches about 170 feet (around 52 meters), which is roughly as deep as the falls are high.

Quick Scoop

  • The deepest point of the Niagara River is directly below the Horseshoe Falls, at about 170 feet (52 meters).
  • The plunge pool right under the Horseshoe Falls is often described as being nearly as deep as the waterfall is tall.
  • At the top (the crest) of the Horseshoe Falls, the river is comparatively shallow, only around 10 feet deep before it goes over the edge.

In simple terms, if you stood the waterfall on its head, the deepest water at the base would reach about the same height as the falling water itself.