Upper Stony Brook Falls is a 42-foot waterfall on Stony Brook in Steuben County, New York, in the Northern Allegheny Plateau region. It lies about 3.3 miles south of Dansville and roughly 44.4 miles south of Rochester as the crow flies.
At 42 feet it is on the modest side for New York, where the typical waterfall with a recorded height stands around 50.5 feet; it ranks 107th of 184.
The Northern Allegheny Plateau is a dissected upland of rolling hills and deep valleys in New York and Pennsylvania, with northern hardwood forest and dairy farms. Creeks cut through layered shale and sandstone in gorges lined with waterfalls, as in the Finger Lakes glens. Stony Brook carries 7 recorded waterfalls, and Upper Stony Brook Falls is the tallest of them.
Steuben County holds 14 recorded waterfalls, and several are close by. Hourglass Falls, is under a mile away. Middle Stony Brook Falls, is under a mile away. Stony Brook Falls, is under a mile away.
Upper Stony Brook Falls is located at 42.5140° N, 77.6919° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The creek name is confirmed against the federal Geographic Names Information System. The position was verified on aerial imagery. Details on trails, parking and access have not been documented for this waterfall yet.