STS61A-33-0047 Lake Champlain and Green Mountains, Vermont, U.S.A. November 1985 Lake Champlain and the Green Mountains of Vermont are featured in this east-southeast-looking, low-oblique photograph. Forming part of the New York-Vermont border, Lake Champlain, with a maximum depth of 399 feet (122 meters), is 125 miles (201 kilometers) long and between 1 and 14 miles (1 and 23 kilometers) wide. The lake is fed at its south end by Ticonderoga Creek, which drains Lake George (right center), and numerous small rivers and creeks draining from the Adirondack Mountains to the west and the Green Mountains to the east. The lake is drained at its north end by the Richelieu River (lower left) that flows northward and empties into the Saint Lawrence River (not visible). The lake, noted for its beautiful scenery and year-round resort and recreational facilities, is a link in the Hudson-Saint Lawrence Seaway. The north-south-trending Green Mountains, a range of the Appalachian Mountains, extend 250 miles (402 kilometers). Mount Mansfield at 4393 feet (1340 meters) is the highest peak. Composed of some of the oldest rocks in North America, the range has low, rounded peaks; fertile valleys; and streams that have furnished water power for many years.