I went in 2011/12 during mid-winter. It was cold, and I thoroughly enjoyed it. The Inn was closed, due to a lack of heating, but it was beautiful to play in the deep snow banks. We sat for hours watching the geysers, and made snowmen. The information center is interesting with Bison pelts and casts of the size of Wolf feet. it truly is beautiful. We went cross country skiing, and saw many Elk, Coyotes, and Bison. I am in love with this place and will definitely visit again.