Lake Pend Oreille is a lake in northern Idaho, with an area of 148 square miles. It is 65 miles long, and 1,150 feet deep in some regions (5th in the US). It is one of the deepest lakes in the world. Fed by Clark Fork River and drained by the Pend Oreille River. It is surrounded by national forests and many small towns. All but the southern tip of the lake is in Bonner County, the southern tip which is home to Farragut State Park, the original home of the Farragut Naval Training Station, and the home of the NAVSEA's Naval Surface Warfare Center Carderock Division's Acoustic Research Detachment (ARD) is in Kootenai County.

The lake is home to many species of fish including: rainbow trout, lake trout, perch, crappie, bass, whitefish and kamloops. The forests are known to have various pines, such as ponderosa pine, Douglas fir, poplar and western larch. Whitetail deer, squirrels, black bears, coyotes and bobcats are known to reside in these forests. Bald Eagles, osprey, owls, hummingbirds, hawks, woodpeckers, ducks and the mountain bluebird are seen in the skies around the lake.