Silver Lake , sometimes Silverlake , is an unincorporated community in Cowlitz County , Washington , in the southwestern portion of the state . Silver Lake is located east of Castle Rock along Washington State Route 504 , which is also known as the Spirit Lake Memorial Highway . The area considered Silverlake is about east of Interstate 5 ( I-5 ) and is approximately from Portland , Oregon , to the south and Seattle about to the north . The closest cities to the subject property are Castle Rock , six miles ( 10 km ) to the west , and Toutle , four miles ( 6 km ) east . The Silver Lake community takes its name from the lake of the same name , which it lies on the northwest shore of . The Silver Lake community is part of the Toutle Lake School District , a K-12 school district of about 600 students . Silver Lake is about west of Mount St. Helens and near the Mount St. Helens National Volcanic Monument , which lies at the end of the Spirit Lake Memorial Highway . The eruption of Mount St. Helens on May 18 , 1980 was the deadliest and most economically destructive volcanic event in the history of the United States . The WDFW has planted Grass Carp in this lake , however it is illegal to fish for or retain grass carp
eruption of Mount St. Helens
1980 eruption of Mount St. Helens
Silver Lake, Washington