Located northeast of Dillon, Montana, Beaverhead Rock is the notable site that inspired the name of Beaverhead Rock State Park and serves as the park’s primary attraction. The Shoshone Indians originally named the landmark Beaverhead Rock due to the resemblance they observed between the rock formation and the head of a swimming beaver. Though many appreciate the unique shape of Beaverhead Rock, few realize that this landmark once served as a beacon of hope to Lewis and Clark, as well as their men, while traveling west toward the Pacific.

As the Corps of Discovery progressed up the Missouri River, they knew that they would eventually reach the Rocky Mountains. In order to survive the mountains, the men would require horses, and the only way to acquire horses would be through trade with one of the local tribes. This was a serious concern for the expedition, and in his journal, Lewis remarked that “if we do not find [the Shoshone] or some other nation who have horses I fear the successful issue of our voyage will be very doubtful.” To increase their chances of success, Lewis and Clark enlisted the help of a young Shoshone woman named Sacajawea who would help with the negotiations for horses.

On August 8, 1805, Sacajawea recognized Beaverhead Rock in the distance and assured the captains that they would soon encounter her people. This landmark significantly boosted the men’s morale and renewed their hopes of completing their journey to the Pacific. The site continues to attract numerous visitors who wish to take in the unique rock formation and observe the landmark that once had such an emotional impact on the Corps of Discovery.

Researched, written, and narrated by University of West Florida Public History Student Ashley Goethe.