Teatown Lake Reservation is a nonprofit nature preserve and environmental education center in Westchester County, New York, in the United States. The reservation includes an 1,000-acre (4.0 km2) nature preserve and education center located in the Westchester towns of Yorktown, Cortlandt, and New Castle. About 25,000 people come each year to hike the preserve's 15 miles (24 km) of trails, attend an education program, visit the Nature Center, or tour "Wildflower Island". Teatown's educators offer adult, family and children's programs to 20,000 participants annually, including nearly 6,000 schoolchildren and 700 summer camp students.