The southeast side of Lone Mountain drains into Rondout Creek, thence into the Hudson River, and into New York Bay.

The west side of Lone Mtn.

drains into Donovan Brook, thence into the East Branch of the Neversink River, the Delaware River, and into Delaware Bay.

drains into the East Branch of the Neversink.

This article about a location in Ulster County, New York is a stub.