Yellowstone is open every day of the year, and is always approachable from the North Entrance outside of Gardiner, MT, which is south of Livingston. This road is plowed in the winter and leads toward the park's Northeast Entrance, toward Cooke City, MT. 官网摘的,北门经Mammoth hot springs到tower junction到东北门全年开放。具体开关时间截了个图。冬季也开门,只不过活动和夏季完全不同~