— highest point is Barbeau Peak at . Jamaica — highest point is Blue Mountain Peak at . Axel Heiberg Island — highest point is Outlook Peak at . Vancouver Island — highest point is Golden Hinde at . Baffin Island — highest point is Mount Odin at . Umnak Island — highest point is Mount Vsevidof at . Unalaska Island — highest point is Makushin Volcano at . Lakes Lake Superior, Canada and the United States — most voluminous lake in Western Hemisphere at 11,600 km3 (2,800 cubic miles) Great Slave Lake, Northwest Territories, Canada — deepest lake in Western Hemisphere at 614 m (2,014 feet) Lake Michigan–Huron, Canada and the United States — most extensive lake in Western Hemisphere and the most extensive fresh water lake on Earth at 117,702 km2 (45,445 square miles) Nettilling Lake on Baffin Island, Nunavut, Canada — most extensive lake on an island on Earth at 5,066 km2 (1,956 square miles) Great Salt Lake, Utah, United States — most extensive endorheic lake at 4,400 km2 (1,700 square miles) Lake Manitou on Manitoulin Island in Lake Huron, Ontario, Canada — most extensive lake on an island in a lake on Earth at 104 km2 (40 square miles) Rivers Mississippi Basin, Canada and the United States — most extensive river basin at 2,981,076 km2 (1,151,000 square miles) Mississippi-Missouri-Jefferson Rivers, United States — longest river system at 6,275 km (3,902 miles) Missouri River, United States — longest main stem river at 3,768 km (2,341 miles) Mississippi River, United States — longest Gulf of Mexico main stem river at 3,544 km (2,202 miles) Yukon River, Canada and the United States — longest Bering Sea main stem river at 3,185 km (1,979 miles) Nelson River, Manitoba, Canada — longest Hudson Bay main stem river at 2,575 km (1,600 miles) Colorado River, United States and Mexico — longest Gulf of California main stem river at 2,330 km (1,450 miles) Columbia River, Canada and the United States — longest Pacific Ocean main stem river at 2,000 km (1,243 miles) Mackenzie River, Northwest Territories, Canada — longest Arctic Ocean main stem river at 1,738 km (1,080 miles) Saint Lawrence River, United States and Canada — longest Atlantic Ocean main stem river at 965 km (600 miles) Extreme points of North American countries Extreme points of Canada Extreme points of Cuba Extreme points of Greenland Extreme points of Mexico Extreme points of