Pyramid Lake

Pyramid Lake is the geographic sink of the basin of the Truckee River, 40 mi northeast of Reno, Nevada, United States.

Pyramid Lake is the biggest remnant of ancient Lake Lahontan, the inland sea that once covered much of western Nevada. It is approximately 27 miles long and 11 miles wide, with a perimeter of 71 miles, covering 112,000 acres entirely enclosed within the Pyramid Lake Paiute Tribe Reservation.Pyramid Lake is fed by the Truckee River, which is mostly the outflow from Lake Tahoe. The Truckee River enters Pyramid Lake at its southern end.