Located at the end of State Highway 504 (52 miles east of Castle Rock), in the heart of the blast zone. The observatory hosts interpretive displays that tell the biological, geological, and human story of Mount St. Helens. Visitors to Johnston Ridge Observatory can enjoy multiple award-winning films, listen to ranger talks, observe the landscape, purchase souvenirs, set off on a hike, or get a light lunch from the food cart.

Check out the annual summer Music on the Mountain series held throughout summer at the Johnston Ridge Observatory outdoor amphitheater (in partnership with Mount St. Helens Institute).

Exhibits - Re-Opening Spring 2023