Tuesday's closure comes shortly after the entirety of the Generals Highway, the park's main road, closed.
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The Kings Canyon National Park entrance station remains open only for pass-through traffic to locations not within the parks.
Officials say high winds and heavy snow, sleet and rain have led to unsafe driving conditions in both National Parks.
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Rock, mud and debris slides, as well as fallen trees, have contributed to the unsafe conditions.
Future updates will be provided later on.