Lake Superior

Lake Superior Basin Statistics

  • Length: 350 mi / 563 km
  • Breadth: 160 mi / 257 km
  • Elevation: 600 ft / 183 m
  • Depth: 483 ft / 147 m average, 1,330 ft / 406 m maximum
  • Volume: 2,900 cubic mi / 12,100 cubic km
  • Water Surface Area: 31,700 square mi / 82,100 square km
  • Drainage Basin Area: 49,300 square mi / 127,700 square km
  • Shoreline Length: 2,726 mi / 4,385 km (including islands)
  • Outlet: St. Marys River to Lake Huron
  • Retention / Replacement Time: 191 years