ONAGAWA 100 TRAILS 100mile 2026
Also known as: Onagawa 100
Based at WACK Onagawa Stadium in Onagawa, Miyagi, runners do four laps of a roughly 35 km circuit (south loop then north loop), then a final south loop. Using part of the Michinoku Coastal Trail, it offers Pacific views from Mt. Ishinage and Mt. Kuromori, and runners need to be ready for winter conditions.
The course tops out at 458 m (low point 3 m). About 40% of the distance is gentle (under 5% grade). In 2025, 87% of starters finished. The median finish was about 34 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 29 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
- Fri, 6 Mar 2026
- Start
- 14:00
- Location
- Miyagi, Japan
- Distance
- 161 km
- Elevation gain
- 8,200 m
- Time limit
- 45h
- ITRA
- 100M
- Official website
- onagawa-100trails-running.com
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 19.9 km | Aid 11周目 南ループ終了（会場） | 19.9 km | — |
| 2 | 35.2 km | Aid 21周目 北ループ終了（会場） | 15.3 km | — |
| 3 | 55.1 km | Aid 32周目 南ループ終了（会場） | 19.9 km | — |
| 4 | 70.4 km | Aid 42周目 北ループ終了（会場） | 15.3 km | Day 2 10:0020h |
| 5 | 90.3 km | Aid 53周目 南ループ終了（会場） | 19.9 km | — |
| 6 | 105.6 km | Aid 63周目 北ループ終了（会場） | 15.3 km | — |
| 7 | 125.5 km | Aid 74周目 南ループ終了（会場） | 19.9 km | — |
| 8 | 140.8 km | Aid 84周目 北ループ終了（会場） | 15.3 km | Day 3 06:0040h |
| F | 161 km | FinishFINISH（会場） | 20.2 km | Day 3 11:0045h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
2025 results
68 starters, 59 finishers (86.8% finish rate). Finish times of those who finished:
- Fastest
- 22h 49m
- Top 10%
- 25h 11m
- Top 25%
- 28h 9m
- Median
- 33h 50m
- Top 75%
- 39h
- Top 90%
- 42h 37m
- Last finisher
- 44h 49m
"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.
Other races
- ONAGAWA 100 TRAILS 70km 2026Sat, 7 Mar 2026 · Miyagi, Japan · 70.4 km
- ONAGAWA 100 TRAILS 35km 2026Sat, 7 Mar 2026 · Miyagi, Japan · 35.2 km
- ONAGAWA 100 TRAILS 16km 2026Sat, 7 Mar 2026 · Miyagi, Japan · 16 km
- ONAGAWA 100 TRAILS 105km 2026Sat, 7 Mar 2026 · Miyagi, Japan · 105.6 km
- ISHINOMAKI 37.5 km 2026Sun, 29 Mar 2026 · Miyagi, Japan · 37.5 km
- 石巻登山マラソン ミドル32km 2026Sun, 29 Mar 2026 · Miyagi, Japan · 32 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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