Button Bay is a 253-acre park on a bluff in Ferrisburgh along 130-mile-long Lake Champlain. Samuel de Champlain (1609), Ethan Allen (1776), Ben Franklin (1776) and Benedict Arnold (1777) have all visited the area. It was once a farm and became a state park in 1964. It is named for the button-like concretions formed by clay deposits along the shoreline. Season runs from the Friday of Memorial Day weekend through the second Monday in October. A large pavilion is available to rent.