Due to a landslide on May 14th, 2023 - Johnston Ridge Observatory will be closed until the unforeseeable future.

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.

8.22.2025:  Johnston Ridge Observatory still remains unreachable due to a landslide that has blocked both lanes of traffic on State Route 504. Further updates on when the visitor center will open will be made available as soon as possible. Learn More. Contact Mt. St. Helens Ranger District for more information. 360-449-7800.

Projected opening date Spring 2027.