July 27, 1806

Fight with the Blackfeet

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Today, the expedition travels in five separate groups along four different rivers. On the Two Medicine River, the young Blackfeet camping with Lewis and his small party attempt to steal rifles and horses. A fatal encounter ensues, and everyone takes flight.

Clark and his group paddle down the Yellowstone passing large herds of bison and elk and camping near present Forsyth, Montana.

South of Pompeys Pillar, Sgt. Pryor and three others are stranded without horses. They decide to haul their gear to the Yellowstone River and make bull boats.

Below the Great Falls of the Missouri, Sgt. Gass and Pvt. Willard swim the horses across the river and head towards the mouth of the Marias River. They camp on the Teton River.

At Lower Portage Camp, Sgt. Ordway and his group load the dugouts and white pirogue and paddle down the Missouri River intending to re-join Ordway tomorrow.

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July 16, 1806

Off to the Marias

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The expedition travels in four separate groups, each with a different destination. Lewis, Drouillard, and Pvts. Joseph and Reubin Field leave the Falls of the Missouri headed to the Marias River. They lunch at Rainbow Falls and encamp at the Grand Fall.

Sgt. Gass’s detachment remains at the White Bear Islands. They repair the wagon trucks that will be used to haul the canoes along the portage route.

On the Yellowstone River, Clark keeps moving downriver in search of trees large enough to make canoes. Moccasins are made for the lame horses, and Clark describes area geology and the mountain sucker—a fish new to science. He camps near present Big Timber, Montana.

On the Missouri River, Sgt. Ordway’s paddlers take the dugout canoes through the Gates of the Mountains, around Oxbow Bend, and past The Bears Tooth.

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September 22, 1805

Bitterroot Mountain triumph

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Lewis and the main party receive food sent by some Nez Perce and later arrive at the Weippe villages ‘having triumphed over the Rocky Mountains’. Clark and Twisted Hair climb up from the Clearwater River, and the two captains re-unite. Conversations ensue using Plains Sign Language, and Twisted Hair draws a map of the two rivers that will take them to the Columbia River.

Elsewhere, a large deputation of various Native Nations— organized in part by Lewis—assembles in St. Louis.

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September 15, 1805

Up to Snowbank Camp

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The expedition travels four miles down the Lochsa River, makes an abrupt turn to the right, and climbs a steep trail to return to the Northern Nez Perce Trail. On the climb, several horses slip and Clark’s desk is broken when a horse rolls “down a mountain for 40 yards”. They camp in an area with banks of old snow that they melt for water.

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June 23, 1805

Portage route adjustments

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Above the Great Falls of the Missouri, Lewis establishes an area to assemble the iron-framed boat, and the dugout canoe—abandoned the previous night—is brought in. On the way back to the lower camp, Clark adjusts the portage route. Prickly pears make walking difficult, and the men suffer from fatigue and sore feet.

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June 13, 1805

"sublimely grand specticle"

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Lewis reaches the Grand Fall of Missouri and marvels at its ‘sublimely grand spectacle’. Several miles downriver, Clark gives Sacagawea a dose of salts as a purgative and the enlisted men move the boats 13 miles up the river.

Near the mouth of the Ohio at Fort Massac, General James Wilkinson has questions about the delegation of Native Peoples who recently arrived aboard the expedition’s barge (keelboat).

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April 7, 1805

Leaving Fort Mandan

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The permanent party—under Capts. Lewis and Clark—leaves Fort Mandan in six dugout canoes and two larger pirogues bound for the Pacific Ocean. They make it only as far as Mitutanka, one of the Knife River Villages. The return party—under Cpl. Warfington—takes the barge and one canoe down the Missouri headed for St. Louis.

In Washington City, James Wilkinson writes to James Madison, United States Secretary of State, accepting his appointment as Governor of Louisiana Territory.

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Discover More

  • The Lewis and Clark Expedition: Day by Day by Gary E. Moulton (University of Nebraska Press, 2018). The story in prose, 14 May 1804–23 September 1806.
  • The Lewis and Clark Journals: An American Epic of Discovery (abridged) by Gary E. Moulton (University of Nebraska Press, 2003). Selected journal excerpts, 14 May 1804–23 September 1806.
  • The Lewis and Clark Journals. by Gary E. Moulton (University of Nebraska Press, 1983–2001). The complete story in 13 volumes.