The river was explored in 1805 by the Lewis and Clark Expedition.

It was used by the Lewis and Clark Expedition on their return trip.

- 1838) was a member of the Lewis and Clark Expedition.

The first detailed information was obtained by the Lewis and Clark Expedition of 1804-1806.

The area has important ties to the Lewis and Clark Expedition of 1804-1806.

Leg 2 was based on the Lewis and Clark Expedition.

The town was the starting point for the Lewis and Clark Expedition in 1804.

In 1805 the Lewis and Clark Expedition recorded seeing the mountain.

The Lewis and Clark Expedition passed through the area in 1805.

The Lewis and Clark Expedition took place from 1804 to 1806.