The Stayers' Hurdle is a Grade 1 National Hunt hurdle race in Great Britain. It is open to horses aged four years or older. It is run on the New Course at Cheltenham over a distance of about 3 miles, with twelve hurdles to be jumped. From Wikipedia
The Irish jockey’s victories in the Mares’ Novices’ Hurdle and Stayers’ Hurdle highlight a strong day for Irish trainers at Cheltenham.