At 310 acres (1.3 km²), Lake Sebago is the largest lake in Harriman State Park in the U.S. state of New York. The name is Algonquian for "big water". Operated by the Palisades Interstate Park Commission, Lake Sebago is surrounded by picnic lawns and play fields, and is popular with anglers fishing for landlocked salmon, lake trout, bass, perch and sunfish. The lake has a swimming beach, hand boat launch (electric motors only) and cabin camping. Lake Sebago lies near Sloatsburg.