Run South London takes place on Sun, Mar 14, 2027 in Morden, United Kingdom. The main route is 21.1 km.
- Date
- Sun, Mar 14, 2027
- Start
- Morden 🇬🇧
- Distance
- 21.1 km
- Level
- Open to all
Your 24-week plan to Run South London
The Base phase starts this week. Built around your fitness and adjusted every day as your form changes; attach the course and it prepares for the climbs too.
Build my planFree to start · No credit card
Run South London is a closed-road half marathon starting and finishing at Morden Park, organised by The Great Run Company with Merton Council.
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 Run South London is 24 weeks away. This is how a coach divides that time. The first phase starts now.
01Base12 weeks · Sep 28, 2026 – Dec 20, 2026
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · Dec 21, 2026 – Jan 31, 2027
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
03Peak3 weeks · Feb 1, 2027 – Feb 21, 2027
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Feb 22, 2027 – Mar 7, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · Mar 8, 2027 – Mar 14, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Frequently asked questions
When is Run South London?
Run South London takes place on Sun, Mar 14, 2027 in Morden, United Kingdom.
How long is Run South London?
The main route is 21.1 km.
Who is Run South London for?
Run South London is open to all participants.
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