A landslide in California’s Big Sur buried a portion of the state’s coastal Highway 1 under 40 feet of rocks and dirt.

The landslide covers a quarter of a mile along the highway, according to the Associated Press, and authorities don’t know when that portion will re-open.

The incident was one of the largest mudslides in California’s history, the Associated Press reports, and comes after the state endured a record level of snow and rain this past winter that caused several other similar events.

Before this weekend, these storms alone were already set to cost the state over $1 billion in damages, according to the Associated Press.

Highway 1 that runs through Big Sur, which has been designated American National Scenic Byway, is a major attraction for tourists.

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Write to Alana Abramson at Alana.Abramson@time.com.