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US Route 12 (US 12) is a federal highway in north central Idaho. It extends from the Washington state line in Lewiston east to the Montana state line at Lolo Pass, generally along the route of the Lewis and Clark expedition,〔 and is known as the Northwest Passage Scenic Byway 〔(Idaho Byways - Northwest Passage Scenic Byway ).〕 It was previously known as the Lewis and Clark Highway. ==Route description== US 12 enters Idaho at the Washington state line in Lewiston, Nez Perce County, crossing the Snake River at the state line. It heads east through Lewiston, turning north to cross the Clearwater River and intersect SH-128. It continues east to overlap US 95 along a limited access section. The overlapped highways run east along the north bank of the Clearwater for , leaving Lewiston and entering the Nez Perce Indian Reservation before separating.〔〔 US 12 then continues east along the north bank of the Clearwater through North Lapwai, past the Ant and Yellowjacket rock formation and a historical marker for the Spalding Mission. It continues east to intersect SH-3 and cross the Clearwater again.〔 US 12 then continues east along the south bank of the Clearwater past historical markers commemorating Indian houses and the ghost town of Slaterville, and, in a rest area at Lenore, a historical marker for the Lenore Tram.〔 Entering Clearwater County, US 12 continues east along the south bank of the Clearwater through Orofino. Just after leaving Orofino, it briefly overlaps SH-7, then continues southeast along the south bank of the Clearwater, past a historical marker for the point where Lewis and Clark first found a western-flowing river.〔〔 In Lewis County, US 12 continues southeast along the south bank of the Clearwater, intersecting SH-11 at Greer and passing a historical marker for a ferry operated in the original 1860 gold rush.〔〔 It then continues southeast into Kamiah, where it intersects SH-162. It then crosses the Clearwater again and leaves Kamiah. It then enters Idaho County, and continues south along the north bank of the Clearwater, crossing Nez Perce National Historical Park. In the park, it passes a historical marker for two sites located about two miles (3 km) away, commemorating the Lewis and Clark Long Camp of 1806 and the Asa Smith mission of 1839 to 1841.〔 It then continues south along the north bank of the Clearwater, intersecting SH-13 across the river from Kooskia. The highway then turns east along the north bank of the Clearwater, passing a historical marker commemorating the camp of Nez Perce led by Looking Glass, and the July 1, 1877 attack by the U.S. Army that provoked Looking Glass to join the Nez Perce retreat with Chief Joseph.〔〔 It continues east along the north bank of the Clearwater, leaving the Nez Perce reservation. US 12 then continues to Lowell, where it turns northeast along the north bank of the Lochsa River through the Bitterroot Mountains. US 12 passes historical markers for Whitehouse Pond, Lewis and Clark's crossing of the Lolo Trail in 1806, and their crossing of the Lolo Pass summit in 1805, before crossing Lolo Pass at to enter Montana.〔〔〔(【引用サイトリンク】Clearwater Web Services">url=http://www.lewisandclarkidaho.com/hwy12.htm )〕 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「U.S. Route 12 in Idaho」の詳細全文を読む スポンサード リンク
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