R.O.C 100k (self-challenge) 2026
Also known as: R.O.C 100mile · ROC 100mile · Road to Overseas races Challenge · ROC 100k · Road to Overseas races Challenge 100k
A self-supported challenge that lets Hokkaido runners build long-distance credentials at home. It starts at midnight with the 100-mile from the Moiwayama ski area in Sapporo and follows the first part of the same course. There are no aid stations or markings, so runners navigate by GPX and resupply themselves.
The course tops out at 1,109 m (low point 32 m). There are 2 big climbs: 605 m around 28–45 km; 769 m around 46–54 km. About 40% of the distance is gentle (under 5% grade). In 2026, 41% of starters finished — a tough one. The median finish was about 27 h, through 2 nights.
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 9 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, 4 Jul 2026
- Start
- 00:00
- Location
- Hokkaido, Japan
- Distance
- 113 km
- Elevation gain
- 6,500 m
- Time limit
- 32h
- ITRA
- 100K
- Official website
- oat.h-p.jp/49097.html
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| F | 113 km | Finish藻岩山スキー場入口駐車場（FINISH） | 113 km | Day 2 08:0032h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2026 results
22 starters, 9 finishers (40.9% finish rate). Finish times of those who finished:
- Fastest
- 23h 23m
- Top 10%
- 23h 23m
- Top 25%
- 25h 52m
- Median
- 27h 15m
- Top 75%
- 27h 15m
- Top 90%
- 31h 23m
- Last finisher
- 31h 23m
"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 (110.6 km)
Other races
- R.O.C 100mile (self-challenge) 2026Sat, 4 Jul 2026 · Hokkaido, Japan · 161 km
- BULSS 北海道 (Backyard Ultra Last Samurai Standing) 2026Sat, 10 Oct 2026 · Hokkaido, Japan
- Shinetsu Five Mountains 110km 2026Tue, 22 Sep 2026 · Nagano, Japan · 112 km
- FunTrails Round Chichibu 100K 2026Sat, 14 Nov 2026 · Saitama, Japan · 105 km
- OSJ KAMI 100 100K 2026Sat, 31 Oct 2026 · Hyogo, Japan · 101 km
- Okumusashi Long Trail 105 km 2026Sat, 30 May 2026 · Saitama, Japan · 105 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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