Mt.FUJI100 - KAI70k 2027
The forecast arrives five days before the start.
Here you'll find the elevation profile, an estimated finish time based on your UTMB Index and details of the 4 aid stations to plan your nutrition and hydration segment by segment.
What's your time based on your UTMB?
Times estimated by the RAVIT model, learned from real ultra-trail finish times. Enter your UTMB Index (utmb.world) to get a personalized estimate.
Cut-off times and crew - Mt.FUJI100 - KAI70k · 2027
Data from the official race rules, checked for every edition. The race rules prevail. Positions are interpolated along the GPX track and are a guide, not official course marking.
What you'll find at each aid station
| Product | K1 Oshinokm 15.7 | K2 Yamanakako Kirarakm 25.3 | K3 Nijumagarikm 38.1 | K4 Fujiyoshidakm 49.8 |
|---|---|---|---|---|
| Water | available | available | available | available |
| Brand products | available | available | available | available |
Elevation profile
The course and its aid stations
Mt.FUJI100 - KAI70k: times, aid-station stops and fuelling needs by UTMB® Index
Between a UTMB® Index of 500 and 800, the estimated finish time on this race runs from 9h55 to 6h05, and the aid-station stop budget from 0h22 to 0h07. The longer the race, the more stops weigh: this is time you should plan to spend standing still, not only running.
Source
| UTMB® Index | Estimated time | Of which stops | Night hours | Carbs | Fluid | Sodium | Cut-off margin |
|---|---|---|---|---|---|---|---|
| 500 | 9h55 | 0h22 | 2.9 | 595 g | 6.9 L | 4,957 mg | +11h05 |
| 550 | 9h06 | 0h18 | 2.1 | 546 g | 6.4 L | 4,546 mg | +11h54 |
| 600 | 8h12 | 0h14 | 1.2 | 492 g | 5.7 L | 4,098 mg | +12h48 |
| 650 | 7h38 | 0h12 | 0.6 | 458 g | 5.3 L | 3,818 mg | +13h22 |
| 700 | 7h04 | 0h10 | 0.1 | 424 g | 5 L | 3,537 mg | +13h56 |
| 750 | 6h37 | 0h09 | — | 397 g | 4.6 L | 3,305 mg | +14h23 |
| 800 | 6h05 | 0h07 | — | 365 g | 4.3 L | 3,041 mg | +14h55 |
Figures based on 60 g of carbohydrate, 700 mL of fluid and 500 mg of sodium per hour, "average" preparation and mild conditions (15–25 °C). Above 25 °C, count on roughly 900 mL/h and 700 mg/h. Carbohydrate intake is trained: 60 g/h is a floor, 90 g/h assumes a glucose-fructose blend and a gut used to it.
Other trails worth preparing for
- Hiroshima Ultra-Trail by UTMB® - HIROSHIMA 100K®98 km · 5,584 m D+ · April 10, 2027
- Hiroshima Ultra-Trail by UTMB® - HIROSHIMA 50K®50 km · 2,735 m D+ · April 10, 2027
- Kagaspa Trail Endurance 100 - KAGASPA 100K97 km · 4,985 m D+ · June 19, 2027
- Kagaspa Trail Endurance 100 - KAGASPA 50K57 km · 2,445 m D+ · June 20, 2027
- Flash Trail Challenge Autumn79 km · 4,287 m D+ · September 26, 2026
Sources and method
- Time projection — times by UTMB Index are taken from the actual splits of runners in each level band on previous editions of this race, aid station stops included. No formula is used as long as these results exist.
- Trail nutrition — hourly targets for carbohydrate, fluid and sodium follow the commonly accepted ultra-endurance guidance. La Clinique du Coureur — Fuelling in trail running
- Course, aid stations and cut-offs — taken from the event's official rules, which prevail in case of any discrepancy. Official site — Mt.FUJI100 - KAI70k
Weather for Mt.FUJI100 - KAI70k
The weather for Mt.FUJI100 - KAI70k will appear here as soon as the forecast models reach that date, around five days before the start: feels-like temperature, rain, snow, wind and storms, section by section and at your passage time.
Detailed weather for Mt.FUJI100 - KAI70k, hour by hour on the courseFrequently asked questions
How many checkpoints?
Mt.FUJI100 - KAI70k has 5 checkpoints: 4 aid stations and 1 checkpoint with undocumented contents. Details are in the two tables above.
What's the longest segment without aid?
The one leading to Fuji Hokuroku Park, Fujisan GX Stadium: 18.1 km and 817 m elevation gain. That's the one to load up for first.
How do I find the exact location of an aid station?
The Google Maps icon in the “Access” column opens the aid station's location: handy for planning your crew's routes.
What distance and elevation gain?
Mt.FUJI100 - KAI70k is 68 km long with 2917 m of elevation gain.
How long to finish?
With a UTMB Index of 600 (average runner), the estimated time is around 8h12 for Mt.FUJI100 - KAI70k.
What's the weather forecast?
The weather for Mt.FUJI100 - KAI70k will be published on this page around five days before the start, once the forecast models reach the race date. It will be detailed section by section: feels-like temperature, rain, snow, wind and storms.
Want to stack the odds in your favor for Mt.FUJI100 - KAI70k?
In 2 minutes, RAVIT generates your complete plan: segment-by-segment time, carbs, water and sodium at every aid station, printable roadbook.
No card required · Instant results