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:''For other places with the same name, see Grande Ronde (disambiguation).'' The Grande Ronde River ( or, less commonly, ) is a tributary of the Snake River, long,〔U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. (The National Map ), accessed May 3, 2011〕 in northeastern Oregon and southeastern Washington in the United States. It drains an area southeast of the Blue Mountains and northwest of the Wallowa Mountains, on the Columbia Plateau. It flows through the agricultural Grande Ronde Valley in its middle course and through a series of scenic canyons in its lower course. ==Course== The Grande Ronde River rises in the Blue Mountains near the Anthony Lakes recreation area in the Wallowa–Whitman National Forest in southwestern Union County approximately south of La Grande. It flows generally north along the east side of the Blue Mountains, then east, past La Grande, then generally northeast through the Grande Ronde Valley in a meandering course between the Blue Mountains and the Wallowa Mountains, receiving Catherine Creek east of La Grande. Approximately northwest of Minam it receives the Wallowa River from the southeast, then receives the Wenaha River at Troy just south of the Washington border. It crosses into southeastern Washington, traversing the extreme southeast corner of the state and entering the Snake from the east, approximately north of the Oregon border and downstream from the mouth of the Salmon River. It receives Joseph Creek from the south upstream from its mouth on the Snake. The mouth of the Grande Ronde River is at the Snake's river mile 169, which is from the mouth of the Columbia River.〔(Grande Ronde Subbasin Plan ) (PDF), Northwest Power and Conservation Council〕 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「Grande Ronde River」の詳細全文を読む スポンサード リンク
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