The Gallatin Skyline (Backpacking) Professional Review and Guide
"A long adventure through the best high country of the northeastern corner of Yellowstone. Regardless of how experienced or well-conditioned you are (and you must be both to attempt this trip!), this hike is a true adventure. This is not a hike you decide to do a few days in advance. Instead, it’s a hike you plan months ahead, going over every detail to keep your pack as light as possible but still to be prepared for all types of weather. If you’re looking for a “get high” backpacking trip to really experience the essence of the Yellowstone high country, this is how you’ll want to spend your summer vacation.
You hike above treeline much of the way, backpacking right over the top of one mountain (Big Horn Peak), and you’ll probably want to take side trips to the top of two more (Electric Peak and Sheep Mountain). You visit five gorgeous high-altitude mountain lakes, camping at three of them. It might be tempting to wait for the wonderful weather that often hits this area in September, but this is also the time the early big game seasons opens in Montana. You’ll run into hordes of hunters on the divide, which is mostly devoid of people the rest of the year. Special attractions: Remoteness and perhaps the best scenery in Yellowstone."