Big Dog's Backyard Ultra: The Last Man Standing

Big's Backyard Ultra has been described as one of the most mentally and strategically complex races in the world. Big's Backyard Ultra has been described as one of the most mentally and strategically complex races in the world. Big's Backyard Ultra has been described as one of the most mentally and strategically complex races in the world. Big's Backyard Ultra has been described as one of the most mentally and strategically complex races in the world.