I-5 Nort - Exit 49
I-5 north at Exit 49 - WA-411 South/WA-504 East/Castle Rock/Toutle
I-5 North Approaching Exit 49
I-5 north approaching Exit 49. Use Exit 49 for Mt. St. Helens Visitors Center and Seaquest State Park.
I-5 South - Exit 49
I-5 south at Exit 49 - WA-411 South/WA-504 East/Castle Rock/Toutle.