We say goodbye to Defender today which is replaced by Phil Gaimon as he takes on France’s most iconic climbs—Tourmalet, Mont Ventoux, Alpe d’Huez, and Galibier. With 4 x 10-minute descending threshold intervals, this session pushes your pacing, endurance, and resilience to the limit, with just enough recovery to reset before the next ascent. It’s a true Defender-style challenge—demanding, rewarding, and built to make you stronger on every climb.
