Lewistons main industries are agriculture, paper and timber products, and light manufacturing. Lewiston is home to Lewis-Clark State College, a public undergraduate college. Cultural activities in Lewiston include the Dogwood Festival, Hot August Nights, and the Lewiston Round Up. Lewiston is located at the confluence of the Snake River and Clearwater River, thirty miles (48 km) northwest of the Lower Granite Dam. Because of dams (and their locks) on the Snake and Columbia River, Lewiston is reachable by some ocean-going vessels. The Port of Lewiston (Idahos only seaport) has the distinction of being the farthest inland port east of the West Coast of the United States. The Lewiston-Nez Perce County Airport serves the city by air.