NNevada - Pyramid Lake

Pyramid Lake Paiute Reservation, Nevada, USA. The lake lies entirely within the reservation, and you have to buy a permit from the tribe to boat or fish. It's the sump for the Truckee River, which exits Lake Tahoe and ends up here. The level of the lake is set by a balance between inflow and evaporation. It's dropped a lot since the arrival of Euro-Americans due to upstream diversions, but a set of lawsuits and legal actions has ensured that it will drop no more. An island (Anaho Is.) important as a bird nesting site was about to turn into a peninsula, which would have made the nesting birds vulnerable to coyotes and other predators.