(CBS SF) — Mount Diablo State Park in Contra Costa County is closed Thursday due to high winds and the threat of wildfires, according to park officials.

At 8 a.m. Thursday, park leadership decided to close the entire park to the public based on fire concerns, Supervising State Park Ranger Cameron Morrison said.

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Sustained wind speeds were measured at 57 mph at 5:55 a.m., with a maximum gust hitting 72 mph at the 3,849-foot peak, Morrison said.

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The decision to close the park was made at 8 a.m., when winds were still hitting a steady 51 mph, according to the park’s website.

The 20,000-plus-acre park serves several hundred people on any given weekday and one class trip had to be canceled Thursday due to the closure, Morrison said.

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Park officials will reevaluate the fire conditions Friday at 8 a.m. and again at 2 p.m. to determine if the park will remain closed.