Iidasan Trail 28K 2026
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Iidasan Trail 28K: about 28 km with 980 m D+, 6 h time limit.
980 m of climbing over 28 km (35 m per km).
Estimate your finish from your ITRA index
Estimate (no finisher data for this race)
How the prediction works
Enter your ITRA performance index to get an estimated finish time, aid-station splits and cutoff margins. This race has no finisher ITRA data, so it uses the transfer model: your predictions for the 297 races that do have finisher data, scaled by distance and elevation gain (km-effort) — the same calculation as the TRAIL STATUS app. Nothing is saved automatically or sent.
The app adds predictions from your training log (Strava), race-day pacing and more. Free, no sign-up.
Predict in detail from my Strava trainingOverview
- Date
- Sat, 31 Oct 2026
- Start
- 08:00
- Location
- Kumamoto, Japan
- Distance
- 28 km
- Elevation gain
- 980 m
- Time limit
- 6h
- Official website
- www.iidasan-trail.com
Elevation profile
No elevation data yet.
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 21.5 km | Aid 1古民家AS | 21.5 km | 12:404h 40m |
| F | 28 km | FINISH | 6.5 km | 14:006h |
The small figure under each cutoff is the time from the start.
Registration
- Registration
- Fri, 14 Aug 2026 – Fri, 2 Oct 2026
- Entry
- First come, first served
Add the race in the app to put registration opening and closing and the lottery results into your calendar.
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From your training log, TRAIL STATUS estimates your finish time, aid-station splits and cutoff margins for this race.
Predict my raceCompiled from each race's official information. Details can change, so always check the race's official website for the latest. Spotted a mistake? Please tell us through the contact form.
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Points to consider for this course
- The overall time limit allows about 12:51/km including stops. This average does not guarantee meeting intermediate cutoffs.
- The longest gap between recorded points, including the start, is about 21.5 km (0–21.5 km). This does not list every water source.
- The profile is missing or estimated. Check the official course map for climb locations and steep sections.
These are simple calculations and observations from recorded information, not personal finish probabilities or difficulty ratings.
Results and official information
Historical field finish rates differ from your personal prediction. This is not a live results service; check official announcements for results and changes.
Check rules and results on the official siteInformation checked: 2026-11-06