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TOUTLE, Wash. -- State highway officials say the highway to the Johnston Ridge Observatory at Mount St. Helens has reopened for the season.

The Vancouver Columbian reports State Highway 504, also known as the Spirit Lake Memorial Highway, reopened for Saturday's It's A Blast event at the observatory. The event typically kicks off the visitor season at Mount St. Helens.

The anniversary of Mount St. Helens' deadly 1980 eruption is next Sunday, May 18.

The highway closes each winter from Hummocks Trailhead to Johnston Ridge, north of the volcano. The Washington State Department of Transportation has to remove snow drives of up to 20-feet high to clear the roadway.

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