SHIGAKOGEN 100 2025
Also known as: Shigakogen 100 55k · Shigakogen 100 · SHIGAKOGEN100
Set on Shiga Kogen in Nagano, at the heart of Joshinetsu Kogen National Park and a UNESCO Eco Park. The race runs at altitude, so it stays cool even in summer, and the course is known for being runnable rather than technical. It grew out of the Shiga Kogen Mountain Trail, held until 2022.
The course tops out at 2,012 m (low point 845 m). There are 2 big climbs: 325 m around 13–20 km; 1,167 m around 32–42 km. About 40% of the distance is gentle (under 5% grade). The median finish was about 9 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
- Sat, 5 Jul 2025
- Location
- Nagano, Japan
- Distance
- 55 km
- Elevation gain
- 2,289 m
- Time limit
- 11h
- ITRA
- 50K
- Official website
- itra.run/Races/RaceDetails/SHIGAKOGEN.100.55km/2025/103137
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| F | 55 km | FINISH | 55 km | — |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
285 finishers. Finish times of those who finished:
- Fastest
- 5h 6m
- Top 10%
- 7h 37m
- Top 25%
- 8h 19m
- Median
- 9h 27m
- Top 75%
- 10h 8m
- Top 90%
- 10h 32m
- Last finisher
- 10h 55m
"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 (55.3 km)
Other races
- Shinetsu Five Mountains 100mile 2026Mon, 21 Sep 2026 · Nagano, Japan · 163 km
- Shinetsu Five Mountains 110km 2026Tue, 22 Sep 2026 · Nagano, Japan · 112 km
- OSJ KOUMI 100 2026Sun, 11 Oct 2026 · Nagano, Japan · 165 km
- NOZAWA 65 km 2026Sun, 19 Jul 2026 · Nagano, Japan · 65 km
- OKUSHINANO 100 100km 2026Sat, 6 Jun 2026 · Nagano, Japan · 100 km
- OSJ ONTAKE100 100K 2026Sun, 19 Jul 2026 · Nagano, Japan · 107 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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