Pack your spurs: two ranches are adding a new dose of glamour to Big Sky Country. Opening this June in Wyoming, the Lodge & Spa at Brush Creek Ranch (doubles from $1,200, all-inclusive) is located on 13,000 sprawling acres. On the itinerary? Twilight tours past a roaming buffalo herd, juniper-oil massages, and plenty of relaxing in the 17 cabins with roaring stone fireplaces. Outside Missoula, Montana’s Resort at Paws Up (doubles from $820, including all meals) is unveiling a new six-tent camp with oversize tubs and butler service this summer.