서울마라톤 (Seoul Marathon) takes place on Sun, Mar 21, 2027 in Seoul, South Korea. The main route is 42.2 km.
- Date
- Sun, Mar 21, 2027
- Start
- Seoul 🇰🇷
- Distance
- 42.2 km
- Level
- Open to all
Your 22-week plan to 서울마라톤 (Seoul Marathon)
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
The 2027 Seoul Marathon includes a full-marathon course starting at Gwanghwamun Square and a 10 km course starting near Jamsil Sports Complex.
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
3:45–4:30
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 서울마라톤 (Seoul Marathon) is 22 weeks away. This is how a coach divides that time. The first phase starts now.
01Base10 weeks · Oct 19, 2026 – Dec 27, 2026
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · Dec 28, 2026 – Feb 7, 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 8, 2027 – Feb 28, 2027
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Mar 1, 2027 – Mar 14, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · Mar 15, 2027 – Mar 21, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Frequently asked questions
When is 서울마라톤 (Seoul Marathon)?
서울마라톤 (Seoul Marathon) takes place on Sun, Mar 21, 2027 in Seoul, South Korea.
How long is 서울마라톤 (Seoul Marathon)?
The main route is 42.2 km.
Who is 서울마라톤 (Seoul Marathon) for?
서울마라톤 (Seoul Marathon) is open to all participants.
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