This session is inspired by 'Facing the Dragon' at IRONMAN Wales! This session includes: 1) A progressive (3-part) warm up. 2) An extended sub-threshold block, including two short periods above FTP, to simulate a short hill before getting back to race pace. 3) Some short, high power surges to enhance ability to hit higher wattages on steep sections. 4) Two 'over-under' blocks to challenge your FTP level and ability to cope with variability to your pacing.