Profile of Sacagawea with her infant son, Jean Baptiste Charbonneau being carried on her back.

Sacagawea (1788-1812) was a Lemhi Shoshone woman who helped the Lewis and Clark Expedition achieve each of its chartered mission objectives exploring the Louisiana Purchase. With the expedition, between 1804 and 1806, she traveled thousands of miles from North Dakota to the Pacific Ocean, established cultural contacts with Native American populations, and researched natural history.

The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the first American expedition to cross what is now the western portion of the United States, departing in May 1804, from near St. Louis making their way westward through the continental divide to the Pacific coast.

Engraver: Glenna Goodacre (GG)

A Native American woman planting seeds in a field of corn, beans and squash.

Maize was domesticated in central Mexico and spread from the southwest through North America, along with symbiotic "Three Sisters" agriculture, in which corn, beans and squash growing in the same mound enhanced the productivity of each plant. In this efficient planting method, corn stalks provided support for the bean vines, which added nitrogen to the soil. Squash provided ground cover, which discouraged weeds. Productivity was much higher (by some estimates as much as 30 percent) for the three grown together than each grown separately.

When Europeans first arrived in the "New World," one of the largest contributions and benefits of their relationships with Native Americans was the sharing of agricultural information. It is widely acknowledged that colonists would not have survived in the New World without the support and knowledge gained from Native American agricultural techniques.

Engraver: Norman E. Nemeth (NEN)

Inscribed along the edge of the coin is the year of minting or issuance of the coin, the mint mark, and also the legend "E Pluribus Unum" (Latin for "Out of many, one").

Position A: edge lettering reads upside-down when Sacagawea's portrait (obverse) faces up.
Position B: edge lettering reads normally when Sacagawea's portrait (obverse) faces up.