Mount Sherrill is a mountain located in Greene County, New York and is part of the Catskill Mountains.Mount Sherrill is flanked to the east by North Dome, and to the west by Balsam Mountain.Mount Sherrill stands within the watershed of the Hudson River, which drains into New York Bay. The northern slopes of Mt. Sherrill drain via Bennett Brook and Newton Brook into the West Kill, then into Schoharie Creek, the Mohawk River, and, finally, the Hudson River. The west side of Mt.