Lake Tahoe is the largest, clearest and second deepest alpine lake in North America. It has 72 miles of shoreline and 63 tributaries but only one outlet, the Truckee River.
The Truckee River is a terminal watershed (it does not flow to the ocean) that ends in Pyramid Lake in the Great Basin Desert of Nevada. The Lake Tahoe Watershed provides a diverse range of habitat for aquatic species and historically, contained Lahontan cutthroat trout (recorded at over 40 pounds), mountain whitefish, Lahontan speckled dace, Lahontan redside, Lahontan tui chub, Paiute sculpin and the endemic Tahoe sucker.
These days, you can still catch massive fish in Lake Tahoe, but they are more likely to be non-native Mackinaw/lake trout.