Teatown Lake Reservation is a nonprofit nature preserve and environmental education center in Westchester County, New York, U.S., located in the towns of Ossining, Yorktown, Cortlandt, and New Castle.

For nearly 100 years, New York–New Jersey Trail Conference volunteers have helped public agencies provide safe and responsible access to open space from New York City west to the Delaware Water Gap and north to the Catskills.

Annually, over 15,000 hikers traverse Teatown's 15 miles (24 km) of trails[1][2] that span fields, mixed forests, lakes, streams, swamps and farm land.

Teatown expanded its Environmental Stewardship Program to manage the flora and fauna living in the preserve for the benefit of nature conservation and regional ecological health.

The EagleFest takes place in February each year, when winter conditions make eagles easier to spot as they search for prey on the Hudson River.