SHIGAKOGEN 100 100km 2026
Also known as: Shigakogen 100 · SHIGAKOGEN100
A 100 km held in Shiga Kogen, a UNESCO Eco Park, starting at Sun Valley before dawn and looping out via Yokote, Ichinose and Ryuo before returning through the night. The plateau sits above 1,400 m, so it stays cool in summer, and the runnable course suits a first 100 km.
The course tops out at 2,007 m (low point 848 m). 5 climbs of 400 m or more keep coming; the biggest is 783 m around 59–71 km. The longest descent drops 1,159 m around 50 km at about 13% on average. About 40% of the distance is gentle (under 5% grade). In 2026, 79% of starters finished. The median finish was about 22 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 45 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, 29 Aug 2026
- Start
- 04:30
- Location
- Nagano, Japan
- Distance
- 100 km
- Elevation gain
- 4,700 m
- Time limit
- 26h
- ITRA
- 100K
- Official website
- www.nature-scene.net/shiga100/coursemap
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 15 km | Aid 11A 横手（標高1,700m） | 15 km | Day 1 08:304h |
| 2 | 28 km | Aid 22A サンバレー（標高1,432m） | 13 km | Day 1 10:306h |
| 3 | 37 km | Aid 33A 一の瀬（標高1,640m） | 9 km | Day 1 13:309h |
| 4 | 46 km | Aid 44A 奥志賀（標高1,490m） | 9 km | — |
| 5 | 60 km | Aid 55A 竜王（標高845m） | 14 km | Day 1 19:0014h 30m |
| 6 | 78 km | Aid 66A 林道入口（標高1,345m） | 18 km | — |
| 7 | 91 km | Aid 77A 一の瀬（標高1,640m） | 13 km | Day 2 03:3023h |
| F | 100 km | FinishFINISH サンバレー | 9 km | Day 2 06:3026h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2026 results
532 starters, 422 finishers (79.3% finish rate). Finish times of those who finished:
- Fastest
- 12h 28m
- Top 10%
- 16h 54m
- Top 25%
- 18h 55m
- Median
- 21h 46m
- Top 75%
- 24h 19m
- Top 90%
- 25h 22m
- Last finisher
- 25h 59m
"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 (100.5 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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