2292 UNITED STATES (Idaho) - Salmon River

There are as many as 17 Salmon Rivers in the United States, but the most spectacular is, without no doubt, the one which flows for 684km through central Idaho, draining a rugged, thinly populated watershed and dropping more than 2,134m between its headwaters, near Galena Summit above the Sawtooth Valley, and its confluence with the Snake River. Known also as The River of No Return, it is one of the largest rivers in the continental United States without a single dam on its mainstem.

1430 UNITED STATES (Idaho) - Idaho map

Bordered by the Canadian province of British Columbia to the north, Montana to the northeast, Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west, Idaho is a mountainous state with an area larger than that of all of New England. The landscape is rugged (snow-capped mountain ranges, rapids, vast lakes and steep canyons) with some of the largest unspoiled natural areas in the US (the Frank Church-River of No Return Wilderness Area is the largest contiguous area of protected wilderness in the continental US). Its highest point is Borah Peak (3,859m), and Shoshone Falls plunges down rugged cliffs from a height greater than that of Niagara Falls.