Turret Mountain (Mount Lincoln) This view, published by Lawrence and Houseworth, was taken from along the Dutch Flat Donner Lake Wagon Road around 1870. Originally Lake Mary was one of two lakes at the foot of Donner Peak. Once the dam was built, it became one. Why was it called Turret Mountain? Who knows? Photo location: 39° 18.706'N 120° 19.890'W