The Big Half takes place on Sun, Sep 6, 2026 in London, United Kingdom. The main route is 21.1 km.
- Date
- Sun, Sep 6, 2026
- Start
- London 🇬🇧
- Distance
- 21.1 km
- Level
- Open to all
The Big Half is a vibrant inclusive half marathon starting at Tower Bridge and finishing by the famous Cutty Sark in Greenwich.
Official event pageWhat this race demands
The Big Half requires sustained pacing over a 21.1 km distance from Tower Bridge to Greenwich.
Aerobic Endurance
Covering 21.1 km requires a well-developed aerobic engine to sustain forward motion over a prolonged running duration without significant fade.
Pacing Discipline
Managing effort across the half marathon distance demands early restraint to ensure an even split from the start at Tower Bridge to the finish at the Cutty Sark.
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.
Estimated finish
1:45–2:10
Peak-week training
5–7 h/week
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 The Big Half is 2 weeks away. This is how a coach divides that time. The first phase starts now.
01Taper1 week · Aug 24, 2026 – Aug 30, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
02Race week1 week · Aug 31, 2026 – Sep 6, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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