400 runners,50 horses racing over 22 miles at LLanwrtyd Wells in Wales. Runners have a 15 minute head start then the horses start in pursuit. The route is tortuous, hills, streams, bogs and forestry tracks. At the halfway point, all the horses are vetted and held until their heart rate is below 64bpm. The race can be won and lost at this point. With prize money of 1000 guineas it attracts top runners and riders. This year the horse was victorious.