Ageo City Half Marathon 2026 takes place on Sun, Nov 22, 2026 in Ageo, Japan. The main route is 21.1 km.
- Date
- Sun, Nov 22, 2026
- Start
- Ageo 🇯🇵
- Distance
- 21.1 km
- Level
- Mixed field
Your 5-week plan to Ageo City Half Marathon 2026
The Peak 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.
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The Ageo City Half Marathon is an annual half marathon in Ageo, Saitama, run on a fast, flat course from Ageo Sports Park. It is open to citizen runners and doubles as a key pre-Hakone Ekiden tune-up for university teams.
What this race demands
The Ageo City Half Marathon demands sustained pacing over a 21.1 km flat distance on a fast course.
Speed endurance
Because the course is flat and fast from Ageo Sports Park, runners must sustain a high turnover and consistent pace for the entire 21.1 km distance.
Pacing discipline
Serving as a key tune-up event featuring university teams, the race requires strict control to avoid early fatigue.
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
1:45–2:10
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 Ageo City Half Marathon 2026 is 5 weeks away. This is how a coach divides that time. The first phase starts now.
01Peak2 weeks · Oct 19, 2026 – Nov 1, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
02Taper2 weeks · Nov 2, 2026 – Nov 15, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
03Race week1 week · Nov 16, 2026 – Nov 22, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Frequently asked questions
When is Ageo City Half Marathon 2026?
Ageo City Half Marathon 2026 takes place on Sun, Nov 22, 2026 in Ageo, Japan.
How long is Ageo City Half Marathon 2026?
The main route is 21.1 km.
What does Ageo City Half Marathon 2026 demand?
The Ageo City Half Marathon demands sustained pacing over a 21.1 km flat distance on a fast course.
Who is Ageo City Half Marathon 2026 for?
Ageo City Half Marathon 2026 has a mixed field of professional and amateur participants.
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