R.O.C 100mile (self-challenge) 2026
Also known as: ROC 100mile · Road to Overseas races Challenge
A self-supported challenge created so Hokkaido runners can earn long-race finishes and points without leaving the island. It starts at midnight from the Moiwayama ski area in Sapporo and loops through hills such as Mt. Kamuidake. There are no aid stations or markings, so runners navigate by GPX and resupply at convenience stores and vending machines.
The course tops out at 1,109 m (low point 29 m). About 40% of the distance is gentle (under 5% grade). In 2026, 8% of starters finished — a tough one.
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 1 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
- 161 km
- Elevation gain
- 9,800 m
- Time limit
- 40h
- ITRA
- 100M
- Official website
- oat.h-p.jp/49097.html
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| F | 161 km | Finish藻岩山スキー場入口駐車場（FINISH） | 161 km | Day 2 16:0040h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
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 (158.7 km)
Other races
- R.O.C 100k (self-challenge) 2026Sat, 4 Jul 2026 · Hokkaido, Japan · 113 km
- BULSS 北海道 (Backyard Ultra Last Samurai Standing) 2026Sat, 10 Oct 2026 · Hokkaido, Japan
- Shinetsu Five Mountains 100mile 2026Mon, 21 Sep 2026 · Nagano, Japan · 163 km
- Joshu Hotakasan Skyview Trail 138km 2026Sat, 12 Sep 2026 · Gunma, Japan · 138 km
- FunTrails Round Chichibu 100MILE 2026Sat, 14 Nov 2026 · Saitama, Japan · 160 km
- KUMAN100 100mile 2026Sat, 13 Jun 2026 · Hiroshima, Japan · 163.8 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.
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