Surrounded by stunning, snowcapped mountains, the valley of Jackson Hole presents some of the most challenging skiing and hiking trails in the world. (Visitors can also river raft, fly fish, bike, commission a helicopter ride to Yellowstone National Park…) To counter all of that alpine activity, some of the area's best local resorts and mountain lodges operate pampering spas to ensure that downtime is downright luxurious. Take a look at the top hotel spas in western Wyoming's big sky territory.