Running

ひたちシーサイドマラソン2026

ひたちシーサイドマラソン2026 takes place on Sun, Nov 15, 2026 in 日立市, Japan. The main route is 42.2 km.

普段は走れない海上道路を舞台に太平洋を望みながら駆け抜ける、アップダウンのあるタフなフルマラソンコースです。

What this race demands

This full marathon covers 42.2 kilometers over a tough course featuring coastal sections and changes in elevation.

Distance durability

Completing 42.2 kilometers requires sustained aerobic endurance and structural resilience against repetitive impact.

Elevation handling

The presence of ups and downs along the course demands specific training for pacing and muscular endurance on slopes.

Aim for 60 to 90 grams of carbohydrates per hour to sustain output over a duration expected to exceed three hours.

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 ひたちシーサイドマラソン2026 is 12 weeks away. This is how a coach divides that time. The first phase starts now.

01Build6 weeks · Aug 24, 2026 – Oct 4, 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 · Oct 5, 2026 – Oct 25, 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 26, 2026 – Nov 8, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
04Race week1 week · Nov 9, 2026 – Nov 15, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.

Organising this race?