For a meal that pairs an Art Deco–inspired space with relatively casual food, head over to Mammoth’s flagship restaurant. The chefs emphasize sustainable options with a distinctively Montana flavor, such as bison sirloin and pistachio-parmesan trout. There’s a typical array of burgers, sandwiches, and salads, though starters/small plates get a bit more creative. The dining room’s expansive mirrors once hung in the 1883 National Hotel, the first lodging on this site.