| Lake Sebago | |
|---|---|
 The lake in 2001 | |
  Lake Sebago  Lake Sebago | |
| Location | Harriman State Park, Rockland County, New York, U.S. |
| Coordinates | 41°11′50″N 74°08′08″W / 41.19722°N 74.13556°W |
| Etymology | Algonquian word for "big water" |
| Primary outflows | Stony Brook |
| First flooded | 1925 |
| Surface area | 310 acres (1.3 km2) |
At 310 acres (1.3 km2), Lake Sebago, near Sloatsburg, is the largest lake in Harriman State Park in the U.S. state of New York. The name is Algonquian for "big water". It is located just south of Lake Kanawauke and is accessible via Seven Lakes Drive and the Palisades Interstate Parkway. New Sebago Beach opened in the 1940s but closed in 2011 due to damage from Hurricane Irene, and the picnic areas closed in 2012 due to Hurricane Sandy.