MP: 24.15 Location: Spirit Lake Memorial Hwy and Eco Park Rd, Cowlitz Cty Reassurance shield after some Ecological Museum thing MP: 33.24 Location: Spirit Lake Memorial Hwy and Forest Learning Center Rd, Cowlitz Cty Reassurance shield after a turnoff for a “Forest Learning Center” MP: 51.81 Location: Spirit Lake Memorial Hwy at Johnson Lake Observatory, … Continue reading State Route 504, SR 504 SPUR to Mt. St. Helens