いぶすき菜の花マラソン takes place on Sun, Jan 10, 2027 in Ibusuki, Japan. The main route is 42.2 km.
- Date
- Sun, Jan 10, 2027
- Start
- Ibusuki 🇯🇵
- Distance
- 42.2 km
- Level
- Open to all
This scenic marathon takes runners through full bloom rapeseed flowers and popular sightseeing spots in Ibusuki with an 8-hour time limit.
Official event pageWhat this race demands
This marathon requires sustained cardiovascular endurance across 42.2 kilometers within an 8-hour completion limit.
Aerobic Endurance
Covering the full 42.2-kilometer marathon distance requires extensive aerobic conditioning and pacing discipline to sustain forward motion over several hours.
Time Limit Management
The 8-hour cutoff requires maintaining a continuous forward progression and efficient aid station routine from start to finish.
Winter Season Adaptation
Racing in January necessitates proper thermal regulation during the early stages while preparing for exertion-based heat management as the effort progresses.
A sustained intake of 60 to 90 grams of carbohydrates per hour is required to maintain energy availability throughout a marathon duration exceeding two and a half hours.
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 いぶすき菜の花マラソン is 20 weeks away. This is how a coach divides that time. The first phase starts now.
01Base8 weeks · Aug 24, 2026 – Oct 18, 2026
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · Oct 19, 2026 – Nov 29, 2026
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 · Nov 30, 2026 – Dec 20, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Dec 21, 2026 – Jan 3, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · Jan 4, 2027 – Jan 10, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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