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The Salmon River is located in Idaho in the northwestern United States. The Salmon is also known as ''The River of No Return''. It flows for through central Idaho, draining a rugged, thinly populated watershed of and dropping more than between its headwaters, near Galena Summit above the Sawtooth Valley in the Sawtooth National Recreation Area, and its confluence with the Snake River. Measured at White Bird, its average discharge is per second.〔http://pubs.usgs.gov/wdr/2005/wdr-id-05-1/ Water Resources Data, Idaho, 2005〕 It is one of the largest rivers in the continental United States without a single dam on its mainstem. Cities located along the Salmon River include Stanley, Clayton, Challis, Salmon, Riggins, and White Bird. Redfish Lake and Little Redfish Lake near Stanley, which flow into the river via Redfish Lake Creek, are the terminus of the longest Pacific sockeye salmon migration in North America. ==Course== The Salmon River originates from and flows through the mountains of central and eastern Idaho (Lemhi Range, Sawtooth, Salmon River Mountains, Clearwater and Bitterroot Range). The main stem rises in the Sawtooth Range at over in elevation, several miles northwest of Norton Peak. For the first , it flows north through the Sawtooth Valley, then turns east at Stanley, receiving the Yankee Fork shortly below that point and the East Fork further downstream. The river then flows northeast, receiving the Pahsimeroi River at Ellis and then the Lemhi River at Salmon, Idaho east of the Lemhi Range. North of Salmon, the river is joined by the North Fork, before turning west into over of continuous canyons through the Salmon River and Clearwater Mountains – some of the most rugged and isolated terrain in the contiguous United States. Exhibiting upwards of of vertical relief, the Salmon River canyons are some of the deepest in the US, surpassing the Grand Canyon and second only to the Snake River's Hells Canyon on the Idaho–Oregon border.〔http://www.blm.gov/id/st/en/visit_and_play/things_to_do/rivers/rivers/lower_salmon_river.html〕 Here, the river is joined by its two largest tributaries, the Middle Fork and South Fork. Ten miles (16 km) downstream (west) of its confluence with the Middle Fork, the Salmon River becomes the dividing line for the two time zones in Idaho: Mountain time to the south, Pacific time to the north, bisecting the state at approximately 45.5 degrees north latitude. The river turns abruptly north at the confluence with the Little Salmon River at Riggins, about above its mouth. From there the river flows almost due north, passing White Bird, before looping northwest and south to its confluence with the Snake River north of Hells Canyon, south of the Washington border and south of Lewiston. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Salmon River (Idaho)」の詳細全文を読む スポンサード リンク
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