Threemile Campground

While Yellowstone National Park is unarguably one of America’s finest treasures, it’s the nearby camping and backpacking that truly allow visitors to experience the pure nature of wild Wyoming. Threemile Campground in Shoshone National Forest is nothing if not wild; in fact, it’s practically guaranteed you’ll come in contact with a grizzly at some point during your stay (thus the hard-sided campers only rule). Sandwiched between multiple wilderness areas and lacking cell service, if you seek an outdoor challenge, this roughhewn campground will definitely deliver.