Originally referred to as Grand Canon, Fredrick Schwatka renamed it in July of 1883 Miles Canyon after General Nelson Miles. Schwatka wrote, "Through this narrow chute of corrugated rock the wild waters of the great river rush in a perfect mass of milk-like foam, with a reverberation that is audible for a considerable distance." Although accounts differ as to the ferocity of the rapids, there is no question that they were very dangerous. During the Gold Rush, hundreds of boats loaded with precious supplies were lost (as well as several lives) before the Northwest Mounted Police arrived to regulate traffic