Llanfair 400 km Audax

What would it take you?

Pick the level closest to yours for an estimate of finish time on this course and the training a solid preparation needs.

A model estimate from distance, climbing and level, not a promise. Conditions, drafting and pacing move it.

IntervalCoach turns those weekly hours into a concrete plan built around your actual fitness. Start with this race as your goal

Your road to race day

Race day at Llanfair 400 km Audax is 28 weeks away. This is how a coach divides that time. The first phase starts now.

1. 01Base16 weeks · Oct 24, 2026 – Feb 12, 2027

   Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.

2. 02Build6 weeks · Feb 13, 2027 – Mar 26, 2027

   Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.

3. 03Peak3 weeks · Mar 27, 2027 – Apr 16, 2027

   The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.

4. 04Taper2 weeks · Apr 17, 2027 – Apr 30, 2027

   Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.

5. 05Race week1 week · May 1, 2027 – May 7, 2027

   Openers, rest and logistics. The work is done; the job now is arriving fresh.

Frequently asked questions

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