Buttermilk Falls is a 35-foot waterfall on Clarks Run in Beaver County, Pennsylvania, in the Western Allegheny Plateau region. It lies about 2 miles east of Big Beaver and roughly 25.9 miles southeast of Youngstown as the crow flies.
At 35 feet it is taller than the typical Pennsylvania waterfall of about 28 feet, ranking 47th of 133 with a recorded height. By form it is a plunge, where the water drops vertically and loses contact with the rock face.
The Western Allegheny Plateau is a maze of narrow ridges and hollows in mixed oak and hardwood forest, with coal mining and small farms. Waterfalls occur where creeks cross sandstone ledges in the hollows.
It is the only recorded waterfall in Beaver County. Hells Hollow Falls, 20 feet high, is about 9.4 miles away. Grindstone Falls, a plunge waterfall, is about 9.9 miles away. Cascade Falls, a 20-foot plunge waterfall, is about 11.3 miles away.
Buttermilk Falls is located at 40.8144° N, 80.3279° 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 exact position has not yet been verified on aerial imagery, so treat the map pin as approximate. Details on trails, parking and access have not been documented for this waterfall yet.