Lewis and Clark at Fort Mandan


This page details the experience at Fort Mandan during the winter of 1804-1805.


Home >> United States History >> Lewis and Clark >> Lewis and Clark and the Mandans


Lewis and Clark

Tour the EPIC Lewis and Clark Journey
Lewis and Clark Interactive
Lewis and Clark Discoveries
Lewis and Clark Summary
Corps of Discovery
Meriwether Lewis
William Clark
Thomas Jefferson
Lewis and Clark Online Activities
Lewis and Clark Printable Activities
Lewis and Clark Videos
Make Your Own Lewis and Clark Map!

Related Historical Events

Louisiana Purchase
Westward Expansion

The Epic Journey

Summer 1804 – Into the Wild
Late 1804 – Teton Sioux Territory
Winter 1804-1805 – the Mandans
April 1805 – Grizzly Country
Summer 1805 – Great Falls of the Missouri River
August 1805 – Shoshone Country
Fall 1805 – the Bitteroots
November 1805 – Columbia River
Winter 1805-1806 – Fort Clatsop
1806 – Return Trip

Fort Mandan

Fort Mandan Replica in North Dakota

By Gooseterrain2 (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

Following the tensions in Teton territory, the Corps traveled northwest along the Missouri River. On October 24, 1804, the Corps reached the villages of the Mandan Sioux near present-day Bismarck, North Dakota called Mitutanka and Nuptadi. It was here, across the river from Mitutanka that the Corps decided to set up winter camp ahead of the icing of the Missouri River, which they called Fort Mandan. Ice on the river would become so thick during the Dakota winter, that herds of buffalo could safely cross. In addition, temperatures during the Dakota winter could drop to -45 Fahrenheit, which caused several members of the expedition to develop frostbite. 

Fort Mandan was constructed of cottonwood lumber cut from the banks of the river. Triangular in shape, the fort was built with high walls, open spaces between buildings, and with a gate facing the river. On the return trip, the expedition found that Fort Mandan had been burned to the ground. 

The Mandans were familiar with European traders who had visited the region to trade for Mandan corn for generations. The Mandan Sioux, however, were not used to seeing African-Americans and were mesmerized by Meriwether Lewis’ African-American slave York, whom they believed had great spiritual powers. 

The Corps quickly established peaceful relations with the Mandans and also attempted to broker peace between the Mandans and the Arikaras, who lived nearby. The Mandan Sioux provided the Corps with food throughout the bitter winter in exchange for trade goods such as metal objects, pots, and other trinkets.

It was during the winter of 1804-1805, that Lewis and Clark hired French-Canadian fur trapper Toussaint Charbonneau and his Shoshone wife, Sacagawea, to translate for them as they turned west toward the mountains.  On February 11, Sacagawea gave birth to a son named Jean Baptiste who would travel with the expedition on his mother’s back. To this point, communication with local natives had been difficult at best and at worst had threatened the entire expedition.

During the winter, Lewis and Clark spent much of their time writing in their journals and documenting the flora and fauna they had observed or collected. 108 plant specimens and 68 mineral specimens were sent via keelboat to St. Louis, Missouri, where they’d next be delivered to Thomas Jefferson, who waited eagerly for such deliveries. 

In the spring, when the torrential rains and warming temperatures melted the ice on the river, the Corps bade their Mandan hosts farewell and continued the journey along the Missouri. 


Lewis and Clark meet the Teton Sioux


Did You Know?


Despite the fact that Sacagawea is portrayed on U.S. coins and postage stamps, no drawings, sketches, or portraits of her are known to exist. Any depiction of her is purely a guess.



NEXT: Grizzly Country