Associated Press - October 11, 2009 3:05 PM ET

CODY, Wyo. (AP) - Winter has descended on Yellowstone National Park in full force, blanketing the region that includes northwestern Wyoming, southern Montana and eastern Idaho with snow.

Managers of America's first national park say late-season visitors should expect winter weather and driving conditions, including temporary road closures and delays.

That goes for the next few days, when storm systems could drop additional snow and could make driving on the park's roads treacherous.

The Beartooth Highway is set to close for the season at 8:00 a.m. Tuesday, as is the road between Tower Fall and Canyon over Dunraven Pass.

The road from Gardiner, Montana, at the park's North Entrance, to Cooke City, Montana, at the park's Northeast Entrance, is open to wheeled vehicles all year.

Yellowstone's 24-hrs road updates line can be reached by calling (307) 344-2117.

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