Fujikawaguchiko, JP · April 2027
Mt. Fuji 100
Mt. Fuji 100 pacing strategy with effort-based splits, nutrition timing, and course-specific risk notes for the 167 km ultra.
- Distance
- 167.00 km
- Elevation gain
- 5151 m
- Typical temp
- 4–18 °C
- Cutoff
- 45:30:00
The short version
A brutal course
- ▸Big climbing day — 5151 m up. Pace the ascents on effort, not the clock.
- ▸Low sun in your eyes around km 1–126 — bring a cap or shades.
- ▸Full overhead sun from km 148 — sunscreen and run the shaded side.
Next edition
23 April 2027
Typical race-day conditions
4–18 °C
We lock the real forecast into your plan in race week.
Course difficulty
BrutalDriven by 5151 m of climbing, 4982 m of quad-pounding descent, altitude up to 1602 m. Harder than MIUT Madeira Island Ultra-Trail (10.0), easier than Swissalpine Davos K68 (10.0) — tougher than 89% of the races we cover.
Race data quality
Medium confidence
Last verified: 24/05/2026
Headline distance and vertical are seeded. Official GPX and checkpoint files are required before high-confidence paid positioning.
Elevation profile
Verified profile
Paid strategy guardrail
Official race packet remains source of truth
Step 1 · Free preview
See the course-adjusted plan first
Enter one recent result. The preview returns course cost, first splits, and fuel target from the deterministic engine and the current course data model.
VDOT
49.1
Estimate
16:36:26
Course cost
+217:26
Fuel target
90 g/h
First 5 km preview
full race locked
- km 15:08
- km 25:40
- km 35:49
- km 44:37
- km 54:42
First race free · then €7 Race Pass · no monthly subscription
Uses an approximate course model; verify final logistics against the official race packet.
Step 2 · Your full Mt. Fuji 100 plan
The preview shows the shape. The plan races it for you.
Course preview
Free
what you see now
- ✓Difficulty score & course data
- ✓Course-cost & toughest km
- ✓Your first full plan free, ever
Race Pass
€7
one-time, this race
- ✓Every km split, weather-adjusted
- ✓Nutrition & fluid timeline
- ✓Heat, wind & sun race tactics
- ✓Danger zones + watch file (GPX)
- ✓Race-week forecast & reminders
Annual
€19
per year, every race
- ✓Everything in Race Pass
- ✓Unlimited races, all year
- ✓Re-plan as your fitness changes
No subscription required — one race is a one-off €7. Cancel anytime on Annual.
Continue with approximate course data →Course elevation
5151 m total gain · 4982 m loss · max 1602 m, min 496 m.
Fly the course
Sun & shade
Sun in your eyes
12 km
Sun on your back
14 km
Side / overhead
34 km
Expect low sun roughly in your eyes around km 1–126 — pack a peaked cap or shades; low glare hides kerbs and potholes. From km 148 the sun sits high overhead — peak UV and radiant heat, so keep sunscreen on and run the shaded side of the road where you can.
Approximate — solar position from the route geometry and a 17:00:00 start (timezone estimated from longitude), for a mid-pack finishing time.
Aid stations
12 stations on course — plan your fueling around them.
Race overview
Mt. Fuji 100 is Japan's marquee 100-mile trail race, combining long runnable sections, night running, and mountain weather around Fuji. It is a priority Asian ultra for race-specific strategy.
How hard is this course?
Reference table — how the Mt. Fuji 100 compares to a flat sea-level course for four typical fitness levels. Computed from the route profile, mean course altitude, and typical race-week climate (11 °C / 70 % humidity). Your personal strategy uses your VDOT, per-km splits, nutrition timing, and the typical climate baseline for this static sample; paid strategies use Open-Meteo when a verified race date is inside the forecast window.
| Runner | Flat-course finish | Mt. Fuji 100 finish | Course cost | Adjusted pace |
|---|---|---|---|---|
| Beginner (VDOT 35) | 17:00:49 | 21:45:45 | +27.9% | 6:12/km |
| Intermediate (VDOT 45) | 13:55:13 | 17:48:21 | +27.9% | 5:04/km |
| Trained (VDOT 50) | 12:47:12 | 16:21:21 | +27.9% | 4:40/km |
| Competitive (VDOT 60) | 11:01:56 | 14:06:41 | +27.9% | 4:01/km |
Reference nutrition
For a 70 kg runner finishing in 16:21:21 at 11 °C. Adjust to your weight and tolerance — these are ISSN-window targets, not prescriptions.
- Carbs / hour
- 90 g
- Total carbs
- 1472 g
- Fluid / hour
- 640 ml
- Sodium / hour
- 500 mg
FAQ
How should I pace Mt. Fuji 100?
Treat the preview as an effort plan, not a fixed road-marathon pace table. The course model includes 6613 m of climbing, so climbs, descents, heat, and aid-station timing matter more than average pace.
How reliable is the current course data?
Headline distance and vertical are seeded. Official GPX and checkpoint files are required before high-confidence paid positioning.
Get your personalized strategy
The numbers above are samples. Sign up free and get the full Mt. Fuji 100 strategy from your VDOT, the current course model, Open-Meteo race-week forecast when available, and your nutrition preferences.
First race free · €7 per additional race · €19/yr for unlimited
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New to trail and ultra pacing? Start with our trail and ultra pacing guide or run the VDOT calculator.