FunTrails Round Chichibu 100K 2026
Also known as: FTR Chichibu · FTR Chichibu& Okumusashi · FTR100K
A big loop from Hitsujiyama Park in Chichibu through the Okumusashi mountains, passing Nenogongen twice and visiting Naguri and Takayama before returning. Runners may nap at the Chonenji aid station. Poles are banned, and night-time courtesy is expected through residential areas.
The course tops out at 958 m (low point 123 m). There are 3 big climbs: 583 m around 12–17 km; 669 m around 34–38 km; 653 m around 81–92 km. About 30% of the distance is gentle (under 5% grade). In 2025, 71% of starters finished. The median finish was about 27 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, 14 Nov 2026
- Start
- 06:00
- Location
- Saitama, Japan
- Distance
- 105 km
- Elevation gain
- 6,831 m
- Time limit
- 32h
- ITRA
- 100K · 5 points
- 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 12:006h |
| 3 | 28 km | Aid 3A3 子ノ権現 | 5 km | Day 1 13:307h 30m |
| 4 | 35 km | Aid 4A4 名栗河川広場 | 7 km | Day 1 15:009h |
| 5 | 49 km | Aid 5A5 ドライブインゆのた | 14 km | Day 1 20:0014h |
| 6 | 59 km | Aid 6A6 子ノ権現 | 10 km | Day 2 00:3018h 30m |
| 7 | 70 km | Aid 7A7 長念寺 | 11 km | Day 2 03:3021h 30m |
| 8 | 83 km | Aid 8A8 高山 | 13 km | Day 2 08:3026h 30m |
| 9 | 93 km | Aid 9A9 県民の森 | 10 km | Day 2 11:3029h 30m |
| F | 105 km | FinishFINISH 羊山公園 | 12 km | Day 2 14:0032h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
556 starters, 394 finishers (70.9% finish rate). Finish times of those who finished:
- Fastest
- 15h 29m
- Top 10%
- 20h 33m
- Top 25%
- 23h 33m
- Median
- 27h 7m
- Top 75%
- 29h 46m
- Top 90%
- 31h 11m
- Last finisher
- 31h 52m
"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 (107.3 km)
Other races
- FunTrails Round Chichibu 100MILE 2026Sat, 14 Nov 2026 · Saitama, Japan · 160 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
- 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.
TRAIL STATUS · FAQ · Privacy policy