Sacajawea Historical State Park is a 284-acre inland waters, day-use park at the confluence of the Snake and Columbia rivers. It features 9,100 feet of freshwater shoreline. The area is spread out with a big sky and excellent views of the two rivers as they flow together. The park features the Sacajawea Interpretive Center, where visitors can learn about the story of the Lewis and Clark expedition through the experiences of Sacagawea, the young Shoshone Indian woman who accompanied the expedition. The Interpretive Center is open seasonally (closes November 1), daily, 10am to 5pm.