Onigajo 100 160km 2026
Eight laps of a 20 km mountain loop from the Narukawa Gorge campground in Kihoku, Ehime. Each lap climbs from a valley at about 400 m to over 1,100 m, and the only aid station is at the venue. It starts in the evening and runs across two nights; the event's aim is to produce more 100-milers from Shikoku.
The course tops out at 1,156 m (low point 434 m). 8 climbs of 600 m or more keep coming; the biggest is 720 m around 20–28 km. Only about 20% is gentle (under 5% grade); most of it is climbing or descending. In 2025, 44% of starters finished — a tough one. The median finish was about 37 h, through 2 nights.
Predict your finish from your ITRA index
Enter your ITRA performance index to get your finish time, aid-station splits and cutoff margins from the results of 8 finishers of this race — the same model 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, 10 Oct 2026
- Start
- 17:00
- Location
- Ehime, Japan
- Distance
- 160 km
- Elevation gain
- 7,520 m
- Time limit
- 42h
- ITRA
- 100M
- Official website
- sites.google.com/view/oni100/%E5%A4%A7%E4%BC%9A%E8%A6%81%E9%A0%85
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 20 km | Aid 11周目 終了（会場） | 20 km | — |
| 2 | 40 km | Aid 22周目 終了（会場） | 20 km | — |
| 3 | 60 km | Aid 33周目 終了（会場） | 20 km | — |
| 4 | 80 km | Aid 44周目 終了（会場） | 20 km | — |
| 5 | 100 km | Aid 55周目 終了（会場） | 20 km | — |
| 6 | 120 km | Aid 66周目 終了（会場） | 20 km | — |
| 7 | 140 km | Aid 77周目 終了（会場） | 20 km | Day 3 06:0037h |
| F | 160 km | FinishFINISH 成川渓谷キャンプ場 | 20 km | Day 3 11:0042h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
36 starters, 16 finishers (44.4% finish rate). Finish times of those who finished:
- Fastest
- 22h 7m
- Top 10%
- 31h 2m
- Top 25%
- 33h 13m
- Median
- 37h 24m
- Top 75%
- 41h 8m
- Top 90%
- 41h 38m
- Last finisher
- 41h 38m
"Top 25%" means one in four finishers had crossed the line by this time.
Years with a different course or different cutoffs are not directly comparable.
Practice courses
See the course on the Runnable map ↗
Runnable has practice courses on this race's trails, split into sections to run and sections to walk (pages in Japanese).
- Runnable practice course (18.7 km)
Other races
- Onigajo 100 200km 2026Sat, 10 Oct 2026 · Ehime, Japan · 200 km
- Shinetsu Five Mountains 100mile 2026Mon, 21 Sep 2026 · Nagano, Japan · 163 km
- Joshu Hotakasan Skyview Trail 138km 2026Sat, 12 Sep 2026 · Gunma, Japan · 138 km
- FunTrails Round Chichibu 100MILE 2026Sat, 14 Nov 2026 · Saitama, Japan · 160 km
- KUMAN100 100mile 2026Sat, 13 Jun 2026 · Hiroshima, Japan · 163.8 km
- LAKE BIWA 100 2026Fri, 30 Oct 2026 · Mie, Japan · 170 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.
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