OSJ Okukuji Trail Short 32.5 km 2025
Point to point from the Ryujin Suspension Bridge to Fukuroda Onsen via Tatchan-no-yu and the hamlet of Mochikata. It follows the second half of the Long course over Okukuji's steep, rolling ridges.
The course tops out at 592 m (low point 88 m). There are 2 big climbs: 313 m around 12–19 km; 320 m around 20–22 km. Only about 30% is gentle (under 5% grade); most of it is climbing or descending. In 2025, 94% of starters finished. The median finish was about 8 h.
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
- Sun, 25 May 2025
- Start
- 07:00
- Location
- Ibaraki, Japan
- Distance
- 32.5 km
- Elevation gain
- 2,210 m
- Time limit
- 12h
- ITRA
- H
- Official website
- www.powersports.co.jp/osjtrail/25_okukuji/race.html
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 13.5 km | Aid 1竜っちゃん乃湯（第1関門） | 13.5 km | Day 1 12:005h |
| 2 | 26 km | Aid 2持方（第2関門） | 12.5 km | Day 1 16:309h 30m |
| F | 32.5 km | FinishFINISH 袋田温泉 | 6.5 km | Day 1 19:0012h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
344 starters, 325 finishers (94.5% finish rate). Finish times of those who finished:
- Fastest
- 3h 34m
- Top 10%
- 5h 32m
- Top 25%
- 6h 35m
- Median
- 7h 32m
- Top 75%
- 8h 28m
- Top 90%
- 9h 25m
- Last finisher
- 11h 24m
"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 (30.4 km)
Other races
- OSJ Okukuji Trail 59 km 2025Sun, 25 May 2025 · Ibaraki, Japan · 59 km
- Tsukubarenzan trailrun in ISHIOKA 70 km 2026Sun, 27 Sep 2026 · Ibaraki, Japan · 70 km
- Tsukubarenzan Middle 45 km 2026Sun, 27 Sep 2026 · Ibaraki, Japan · 45 km
- Tsukubarenzan Short 25 km 2026Sun, 27 Sep 2026 · Ibaraki, Japan · 25 km
- BULSS 茨城 (Backyard Ultra Last Samurai Standing) 2026Sat, 7 Nov 2026 · Ibaraki, Japan
- ONAGAWA 100 TRAILS 35km 2026Sat, 7 Mar 2026 · Miyagi, Japan · 35.2 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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