Clarkston is a city in Asotin County, Washington. It is part of the Lewiston, ID-WA metropolitan area, and is located west of Lewiston, Idaho, which is across from the Snake River. The population of Clarkston is around 7,000 people, but it feels bigger with its neighbor Lewiston, Idaho. This entire area makes a great vacation destination for a variety of outdoor activities. The area rivers are popular for rafting, boating, fishing, kayaking, swimming and more.