Watch Riding The Dragon (1970) : Full Movie Online Free This film follows runner Huw Jack Brassington, as he tackles the hardest five-day mountain race in the world, The Dragon's Back Race. We'll follow Huw's journey as he battles with injury and the ever-looming possibility of failure as he attempts to run 315km down the mountainous spine of Wales. Will he manage to run five ultra marathons in five days having never before attempted one?