Running

おかやまマラソン2026

おかやまマラソン2026 takes place on Sun, Nov 8, 2026 in 岡山市, Japan. The main route is 42.2 km.

岡山県総合グラウンドをスタートし岡山市内を巡って同グラウンドでフィニッシュする、日本陸連公認のフルマラソンコースです。

What this race demands

This standard 42.2-kilometer marathon requires sustained pacing and structural durability over the full running distance.

Aerobic Endurance

The 42.2-kilometer distance requires a high level of cardiovascular capacity to sustain a forward running motion for several hours.

Impact Durability

Running continuously over the full marathon distance places significant repetitive load on the lower limbs and musculoskeletal system.

Consume 60 to 90 grams of carbohydrates per hour to maintain energy balance throughout the duration of the marathon.

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

Race day at おかやまマラソン2026 is 11 weeks away. This is how a coach divides that time. The first phase starts now.

01Build5 weeks · Aug 24, 2026 – Sep 27, 2026
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
02Peak3 weeks · Sep 28, 2026 – Oct 18, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
03Taper2 weeks · Oct 19, 2026 – Nov 1, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
04Race week1 week · Nov 2, 2026 – Nov 8, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.

Organising this race?