Ah what to do!? Most people associate Sun Valley recreation with world-class skiing, but that is really only a small part of the story. The activity anxiety can run high when deciding whether to go hiking, golfing, backpacking, mountain biking, whitewater rafting, or fly fishing and can take more energy than the actual endeavor itself. "Be the ball" rings in the ears of locals with over 81 holes of golf to be played in the area. Trails sprout like tentacles from each nook and cranny and, indeed, a river runs through it ( holding feisty 18"+ rainbow trout). So dig into the details and don't be surprised when you end up needing a vacation from your vacation.
As the Lonely Planet says, it’s a “rugged land of crenelated mountains and cascading rivers that harbors more wilderness than anywhere in the Lower 48.” And that is an invitation to play if we ever saw one.