Lake Size: 148 sq mi (383 km)
Shoreline Length (Miles): 111 Miles
Deepest Depth: 1,150 ft (351 m)
Latitude: 48.166667
Longitude: -116.333333
Lake Level Above Sea Level: 2067 ft (630 m)
Counties: Bonner County
Cities: Sandpoint

Information: "Lake Pend Oreille was glacially formed during the ice age. It is also believed that the eastern side of the lake was in the path of the ancient Missoula Flood. The lake sits at the south end of the Purcell Trench, carved by glaciers moving south from Canada. The eastern side of the glacier is believed to have formed the dam for the Missoula flood, at the point where the Clark Fork river enters the lake between the Cabinet and Bitteroot mountains. The area around the Lake is the traditional home of the Kalispell Indian peoples. David Thompson established a Northwest Company trading post on the lake in 1809. A French Canadian fur trader on Thompson's party is believed to have given the lake its name. The words ""Pend Oreille"" are French for an ear-hanging or pendant. Ear pendants were characteristic of the Kalispell tribe. The lake is shaped much like a human ear when viewed from above or on a map. During World War II, the south end was the second largest naval training ground in the world. Built as a result of the Japanese attack on Pearl Harbor, the training station is now Farragut State Park. The lake is still used by the Navy's Acoustic Research Detachment to test large-scale submarine prototypes: the significant depth gives acoustic properties similar to the open ocean."