Running

さいたまマラソン

さいたまマラソン takes place on Sun, Feb 14, 2027 in さいたま市, Japan. The main route is 42.2 km.

さいたまマラソンは、さいたま新都心駅周辺を発着し、埼玉スタジアム2〇〇2や浦和駒場スタジアム前などを巡る日本陸上競技連盟公認コースのマラソン大会です。

What this race demands

This 42.2 km road marathon demands sustained aerobic endurance and pacing discipline over the standard full-marathon distance.

Aerobic Endurance

Covering 42.2 km requires a high level of cardiovascular capacity and muscular stamina to maintain forward progression over several hours.

Pacing Discipline

A standard marathon distance demands even or conservative early splits to prevent premature glycogen depletion in the final third of the race.

Consume 60 to 90 grams of carbohydrates per hour to maintain energy availability throughout the multi-hour effort.

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 さいたまマラソン is 25 weeks away. This is how a coach divides that time. The first phase starts now.

01Base13 weeks · Aug 24, 2026 – Nov 22, 2026
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · Nov 23, 2026 – Jan 3, 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 · Jan 4, 2027 – Jan 24, 2027
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Jan 25, 2027 – Feb 7, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · Feb 8, 2027 – Feb 14, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.

Organising this race?