http://www.nps.gov/yell/planyourvisit/entrances.htm 具体信息查询官网比较靠谱,官网会更新公园开放情况。目前的情况是: Most park roads are CLOSED to auto travel between early November and late April. The road from the North Entrance at Gardiner, Montana, through the park to Cooke City, Montana, via Tower Junction is open twenty-four hours a day, all year to auto travel. U.S. Highway 212 is closed to auto travel just east of Cooke City from late fall to late spring.
Most park roads are CLOSED to auto travel between early November and late April.
The road from the North Entrance at Gardiner, Montana, through the park to Cooke City, Montana, via Tower Junction is open twenty-four hours a day, all year to auto travel.
U.S. Highway 212 is closed to auto travel just east of Cooke City from late fall to late spring.
四月底西门北门应该都开了