Johnston Ridge Observatory is closed for the winter season and will re-open in mid-May. Visitors can still experience Mount St. Helens from State Hwy 504 at the Coldwater Learning Center, open weekends 10:00am- 4:00pm.
The Mount St. Helens Visitor Center, operated by WA State Parks, is open Thursday- Sundays through the winter and is about 5 miles east of I-5 on Hwy 504.
Hwy 504 is gated and closed at the Hummocks Trailhead, just past the Coldwater Learning Center.