The Willapa Hills is a range of hills in Pacific County, Washington State. 3,061 foot (933 meter) Boistfort Peak is the highest point. The Willapa Hills are the lowest uplands in the entire Pacific Coast Range system. Almost all of the land is privately held and has been repeatedly logged. Only a few long corners remain with virgin forest. Alders less than twenty years old are typically harvested for pulp mills. Pacific County is a county located in the state of Washington. ... Official language(s) None Capital Olympia Largest city Seattle Area - Total - Width - Length - % water - Latitude - Longitude Ranked 18th 184,824 km² 385 km 580 km 6. ... The Pacific Coast Ranges are the series of mountain ranges that stretch along west coast of North America from Alaska to Mexico. ... For other uses, see Alder (disambiguation). ... A Pulp Mill is a manufacturing facility that converts wood chips into a thick fibre board which can be shipped to a Paper Mill for further processing. ...