The Blind Brook watershed is a significant, natural drainage basin and environmental resource located in Westchester County, New York. It occupies approximately 10.91 square miles or 6,980 acres falling largely within the Town of Rye. It spans the borders of New York and Connecticut.

Marshlands Conservancy is a 147-acre nature preserve in the city of Rye, New York, fully owned and operated by Westchester County Parks. It has numerous wildlife habitats, ranging from ponds to creeks to a large meadow area, succession forest, freshwater wetlands, and the only extensive salt marsh in Westchester. It borders Long Island Sound and can be entered via an easement on the historic Boston Post Road. It is one of 5 properties that together constitute the Boston Post Road Historic District. It has high archaeological sensitivity. The conservancy has also been designated an Important Bird Area.