Marronnier Route 2026
The shortest race of the Koshu Alps event, looping from Enzan in Koshu City via the Fukasawa and Marronnier aid stations. It is mostly mountain trail with plenty of up and down through beech and mizunara forest.
The course tops out at 1,528 m (low point 459 m). There are 2 big climbs: 1,069 m around 5–14 km; 350 m around 27–29 km. The longest descent drops 681 m around 22 km at about 16% on average. About 30% of the distance is gentle (under 5% grade). In 2025, 100% of starters finished. The median finish was about 7 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 40 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
- Sun, 8 Nov 2026
- Start
- 09:00
- Location
- Yamanashi, Japan
- Distance
- 36 km
- Elevation gain
- 1,900 m
- Time limit
- 11h
- ITRA
- M
- Official website
- www.lamontee.net/koshualps/race
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 15 km | Aid 1CP4 深沢エイド | 15 km | 17:008h |
| 2 | 27 km | Aid 2CP5 マロニエエイド | 12 km | 19:3010h 30m |
| F | 36 km | FINISH | 9 km | 20:0011h |
The small figure under each cutoff is the time from the start.
Registration
- Registration
- Sat, 6 Jun 2026 – Mon, 31 Aug 2026
- Entry
- First come, first served
Add the race in the app to put registration opening and closing and the lottery results into your calendar.
2025 results
93 starters, 93 finishers (100% finish rate). Finish times of those who finished:
- Fastest
- 4h 35m
- Top 10%
- 5h 28m
- Top 25%
- 5h 54m
- Median
- 7h 5m
- Top 75%
- 8h 3m
- Top 90%
- 8h 35m
- Last finisher
- 10h 54m
"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 (32.8 km)
Other races
- Mt.FUJI 100 KAI70k 2026Sat, 25 Apr 2026 · Yamanashi, Japan · 68.6 km
- Mt.FUJI 100 KAI70k 2027Sat, 24 Apr 2027 · Yamanashi, Japan · 67.9 km
- Mt.FUJI 100 ASUMI40k 2026Sat, 25 Apr 2026 · Yamanashi, Japan · 38.5 km
- Mt.FUJI 100 ASUMI40k 2027Sat, 24 Apr 2027 · Yamanashi, Japan · 38.5 km
- Mt. Fuji Mountain Race 15 km 2026Fri, 24 Jul 2026 · Yamanashi, Japan · 15 km
- Takeda no Mori 30 km 2026Sun, 13 Dec 2026 · Yamanashi, Japan · 30 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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