The Sacagawea Dollar is a one-dollar coin issued by the United States Mint, first released in 2000. It features a depiction of Sacagawea, a Shoshone woman who assisted Lewis and Clark during their expedition. The 2012 edition of the Sacagawea Dollar is part of the Native American series, which honors the contributions of Native Americans to the history of the United States. Collectors often seek out these coins for their artistry and the historical significance attached to them.