Get ready to run through some truly spectacular terrain just west of Yellowstone National Park, with courses winding through Custer Gallatin National Forest and surrounded by three national forests, clear streams, and mountain lakes—and you can pick your preferred distance with options for marathon, half marathon, or 10K. You'll get all the runner perks you'd expect: chip timing, well-stocked aid stations, a clearly marked route, plus a medal, custom bib, sticker pack, Hammer Nutrition goodies, and snacks at the finish line for every participant. Just remember that the Forest Service recommends bringing bear spray along for the run, and you can grab a discounted race shirt online to have shipped to your home.