I had learned a couple of years ago that the historic hotel at Mammoth Hot Springs would be closed during the winters of 2016-17 and 2017-18 for major reconstruction. Now plans have changed, according to the Public Affairs Office; right now you can reserve rooms for winter visits, starting on December 15th, with the dates similar to those for the Old Faithful Snow Lodge and Cabins. Visit Xanterra’s Winter Lodges page or call 1-307-344-7311 to book your room.
Starting in fall 2018 through winter season 2018–19 you will find the hotel closed again for further work on the interior, but I expect the related cabins, the dining room, and the casual Terrace Grill will be open.
Incidentally, in recent summers I’ve found meals in the pleasant hotel dining room—located across the street from the hotel proper—to be excellent. So far, this dining room has not required advance reservations, but that could change.
Photo credit: Jim Peaco, National Park Service, December 12, 2012