TOKYO Nariki Forest Trail Run 21K 2026
TOKYO Nariki Forest Trail Run 21K: about 21 km, 4.25 h time limit.
Estimate your finish from your ITRA index
Estimate (no finisher data for this race)
Enter your ITRA performance index to get an estimated finish time, aid-station splits and cutoff margins. This race has no finisher ITRA data, so it uses the transfer model: your predictions for the 290 races that do have finisher data, scaled by distance and elevation gain (km-effort) — the same calculation 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
- Sun, 17 May 2026
- Start
- 10:00
- Location
- Tokyo, Japan
- Distance
- 21 km
- Time limit
- 4h 15m
- Official website
- kfctriathlon.com/html/event_trail.html
Elevation profile
No elevation data yet.
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 12 km | Aid 1黒山山頂 | 12 km | 12:302h 30m |
| F | 21 km | FINISH | 9 km | 14:154h 15m |
The small figure under each cutoff is the time from the start.
Registration
- Registration
- Fri, 27 Feb 2026 – Sun, 12 Apr 2026
- Entry
- First come, first served
Add the race in the app to put registration opening and closing and the lottery results into your calendar.
Other races
- HASETSUNE 30K 2026Sun, 29 Mar 2026 · Tokyo, Japan · 30.2 km
- Tokyo Grand Trail 200km 2026Fri, 22 May 2026 · Tokyo, Japan · 193 km
- Tokyo Grand Trail 200km 2027Fri, 28 May 2027 · Tokyo, Japan · 193 km
- Tokyo Grand Trail 160km 2026Fri, 22 May 2026 · Tokyo, Japan · 152 km
- Tokyo Grand Trail 160km 2027Fri, 28 May 2027 · Tokyo, Japan · 152 km
- Tokyo Grand Trail 90km 2026Fri, 22 May 2026 · Tokyo, Japan · 94 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.
TRAIL STATUS · FAQ · Privacy policy