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Mount St. Helens’ Johnston Ridge Observatory is slated to reopen to the public in spring 2027, according to a recently re-released timeline detailing the phases of restoration work to state Highway 504, also known as Spirit Lake Highway.
A landslide that covered the road with 300,000 cubic yards of rock, mud, ice and other debris closed the highway May 14, 2023, near where the road is seasonally blocked to winter traffic.
