In West Yellowstone, Montana, sled dog mushers of all ages gather to compete in the Rodeo Run, a two-day race. These sled dogs aren't just the typical Siberian husky—some have been crossed with other breeds to go farther and faster. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets