Okumusashi Long Trail 105 km 2026
A loop of the Okumusashi Long Trail, created in 2021 largely by residents of five mountain districts of Hanno, Saitama. From Hanno Central Park it links Ne-no-Gongen, Mt. Bonoore, Mt. Izugatake, Kanhasshu Miharashidai and Kaburi Pass; the hills are low, but the climbs never let up.
The course tops out at 1,221 m (low point 116 m). There are 2 big climbs: 789 m around 26–38 km; 981 m around 42–54 km. The longest descent drops 713 m around 38 km at about 16% on average. Only about 20% is gentle (under 5% grade); most of it is climbing or descending. In 2026, 60% of starters finished. The median finish was about 30 h, through one night.
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 69 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, 30 May 2026
- Start
- 06:00
- Location
- Saitama, Japan
- Distance
- 105 km
- Elevation gain
- 8,300 m
- Time limit
- 36h
- ITRA
- 100K
- Official website
- okumusashi105k-race.com/race-info
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 9.4 km | Aid 1WA1 東峠（水） | 9.4 km | — |
| 2 | 17.4 km | Aid 2A1 子ノ権現 | 8 km | — |
| 3 | 26.8 km | Aid 3A2 原市場 | 9.4 km | Day 1 13:307h 30m |
| 4 | 42.5 km | Aid 4A3 ノーラ名栗 | 15.7 km | Day 1 18:0012h |
| 5 | 60.4 km | Aid 5A4 名栗げんきプラザ | 17.9 km | Day 2 03:0021h |
| 6 | 74.3 km | Aid 6A5 ビジターセンター（旧北川小学校） | 13.9 km | Day 2 08:0026h |
| 7 | 89 km | Aid 7WA2 阿寺諏訪神社（水） | 14.7 km | — |
| 8 | 97.1 km | Aid 8A6 長念寺 | 8.1 km | Day 2 16:0034h |
| F | 105 km | FinishFINISH 飯能中央公園 | 7.9 km | Day 2 18:0036h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2026 results
574 starters, 347 finishers (60.5% finish rate). Finish times of those who finished:
- Fastest
- 15h 56m
- Top 10%
- 23h 26m
- Top 25%
- 26h 35m
- Median
- 30h 17m
- Top 75%
- 33h 17m
- Top 90%
- 34h 49m
- Last finisher
- 35h 53m
"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 (106.8 km)
Other races
- FunTrails Round Chichibu 100MILE 2026Sat, 14 Nov 2026 · Saitama, Japan · 160 km
- FunTrails Round Chichibu 100K 2026Sat, 14 Nov 2026 · Saitama, Japan · 105 km
- Okumusashi Long Trail 35 km 2026Sun, 31 May 2026 · Saitama, Japan · 35 km
- Trainic World 162.8 km 2026Sat, 16 May 2026 · Saitama, Japan · 162.8 km
- Trainic World 108.2 km 2026Sat, 16 May 2026 · Saitama, Japan · 108.2 km
- Kitamusashi GIANT'S GATE 2026Sat, 18 Apr 2026 · Saitama, Japan · 85.8 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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