FunTrails Round Chichibu & Okumusashi 50K 2026
Also known as: FTR Chichibu · FTR Chichibu& Okumusashi · FTR100K · FTR50K · FTR50 · FT50 · FunTrails 100K - FT50
A loop from Hitsujiyama Park in Chichibu through the Okumusashi hills via Shomaru, Takayama and the Prefectural Forest, held in autumn-foliage season and including stretches through residential areas. Poles are not allowed, and course marking aims for zero lost runners.
The course tops out at 960 m (low point 203 m). There are 2 big climbs: 586 m around 12–17 km; 757 m around 28–41 km. About 30% of the distance is gentle (under 5% grade). In 2025, 82% of starters finished. The median finish was about 10 h.
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 60 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, 14 Nov 2026
- Start
- 09:00
- Location
- Saitama, Japan
- Distance
- 54 km
- Elevation gain
- 2,985 m
- Time limit
- 12h
- ITRA
- 50K
- Official website
- fun-trails.com/race/100k/about
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 12 km | Aid 1A1 国際釣場 | 12 km | — |
| 2 | 23 km | Aid 2A2 正丸駅 | 11 km | Day 1 14:005h |
| 3 | 32 km | Aid 3A3 高山 | 9 km | Day 1 16:007h |
| 4 | 42 km | Aid 4A4 県民の森 | 10 km | Day 1 19:0010h |
| F | 54 km | FinishFINISH 羊山公園 | 12 km | Day 1 21:0012h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
762 starters, 622 finishers (81.6% finish rate). Finish times of those who finished:
- Fastest
- 5h 19m
- Top 10%
- 8h 1m
- Top 25%
- 9h
- Median
- 10h 2m
- Top 75%
- 11h 2m
- Top 90%
- 11h 41m
- Last finisher
- 12h
"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 (53.9 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 105 km 2026Sat, 30 May 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
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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