 Continuing south, West Side Highway / State Route 411 connects Castle Rock to Longview, Washington, and Ocean Beach Highway (State Route 4), putting Castle Rock 75 miles from Willapa National Wildlife Refuge and the Pacific Ocean.The Castle Rock Park & Ride is located on Huntington Avenue next to Interstate 5 Exit 49.Bus service is provided by Lower Columbia CAP Rural Public Transit to Longview and Chehalis, via Interstate 5.