Ishibutai 100 100K 2027
Also known as: ISHIBUTAI 100
Ishibutai 100 is a winter trail race set in Asuka, Nara, with its history and hills, starting and finishing at Asuka Kaze Butai. The 100K is four laps of a marked 25km loop that carries you through the night, and the venue and drop bag let you reset food and gear each lap.
4,000 m of climbing over 100 km (40 m per km).
Estimate your finish from your ITRA index
Estimate (no finisher data for this race)
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 205 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 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, 30 Jan 2027
- Start
- 09:30
- Location
- Nara, Japan
- Distance
- 100 km
- Elevation gain
- 4,000 m
- Time limit
- 28h 30m
- ITRA
- 100K
- Official website
- go-trail.net/pages/ishibutaitop
Elevation profile
No elevation data yet.
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 25 km | Aid 1あすか風舞台（1周目） | 25 km | — |
| 2 | 50 km | Aid 2あすか風舞台（2周目） | 25 km | — |
| 3 | 75 km | Aid 3あすか風舞台（3周目） | 25 km | — |
| F | 100 km | FinishFINISH あすか風舞台 | 25 km | Day 2 14:0028h 30m |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
Registration
- Registration
- Sat, 1 Aug 2026 – Sat, 31 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.
Other races
- BAMBI100 100mile 2026Sat, 21 Nov 2026 · Nara, Japan · 160 km
- Diamond Trailrun 33K 2026Sat, 7 Nov 2026 · Nara, Japan · 33 km
- Ishibutai 100 120K (unmarked) 2027Sat, 30 Jan 2027 · Nara, Japan · 120 km
- Ishibutai 100 50K 2027Sat, 30 Jan 2027 · Nara, Japan · 50 km
- Ishibutai 100 25K 2027Sun, 31 Jan 2027 · Nara, Japan · 25 km
- Shinetsu Five Mountains 110km 2026Tue, 22 Sep 2026 · Nagano, Japan · 112 km
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.
TRAIL STATUS · FAQ · Privacy policy