page_title: Tucannon River
section_title: Lewis and Clark expedition
hierarchical_section_title: Tucannon River / History / Lewis and Clark expedition
caption_attribution_description: English: The Lewis and Clark Expedition monument — in the Tucannon River Valley, in Columbia County, far southeastern Washington. Stone monument marks where the Expedition entered the valley, following the Nez Perce Trail from Dayton, on their return east in 1806. Photograph uploaded for article titled&#160;; be patient, the article will be uploaded shortly. Photo taken in September, 2006. Uploaded by photographer. All rights released.
context_page_description: The Tucannon River is a tributary of the Snake River in the U.S. state of Washington. It flows generally northwest from headwaters in the Blue Mountains of southeastern Washington to meet the Snake 4 miles upstream from Lyons Ferry Park and the mouth of the Palouse River. The Tucannon is about 62 miles long. Part of the upper river flows through the Wenaha–Tucannon Wilderness.
context_section_description: On October 12, 1805, after a difficult passage through Snake River rapids, Lewis and Clark passed through a shorter rapids just east of the mouth of the Tucannon. Lewis wrote, "This we called called Kimooenim creek". The expedition did not stop, but continued down the Snake in dugouts.
  On their return trip to St. Louis on May 2, 1806, Lewis and Clark followed the Nez Perce Trail, crossing over from Patit Creek about 2.5 miles (4.0 km) east of present-day Dayton to meet the Tucannon. Only 12 miles (19 km) beyond their campsite they reached the stream.
  This creek rises in the southwest [Blue] mountains, and though only twelve yards wide discharges a considerable body of water into Lewis' river (the Snake River), a few miles above the narrows. Its bed is pebbled... (I)n its narrow bottoms are found some cottonwood, willow and the underbrush which grows equally on the east branch of the Wollawollah [Touchet].
  Lewis and Clark camped on the Pataha Creek (a tributary to the Tucannon), which is recorded as the first locality for some distance where they were able to find ample firewood.
caption: Point where Lewis and Clark entered the Tucannon River valley
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