The falls consist of cascading rapids and several 20 foot waterfalls, with a total 76 foot drop in elevation over a distance of less than a mile.
The Potomac River narrows from nearly 1000 feet, just above the falls, to between 60 and 100 feet wide as it rushes through Mather Gorge, a short distance below the falls. The Great Falls of the Potomac display the steepest and most spectacular fall line rapids of any eastern river.
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