Fujiyoshida, Yamanashi Pref., Japan · Sunday, April 18, 2027

Fixed Distance 100K

Fuji 5 Lakes Sparta Challenge

227 days away
120 km Distance
not publishedn/a Climbing
6.0 est Grit · Hardcore

Calculated from 120 km alone — the organiser has not published an elevation profile. Read 6.0 as a floor, not a verdict.

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35.4875° N, 138.8078° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 12 hours 6:00 min/km average. Tight. You are racing the clock from the start. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 100K cut-offs we track. Measured against 203 races of the same distance. Cut-off calculator →
Field size ~430 Large. Rarely out of sight of another runner.

DUV results for the 2026 edition (120km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, April

Daytime high 15°C
Night low 4°C
Rainfall Showers likely
Daylight 13 h 09 m of light

Regional 2001-2020 average for April — NASA POWER, grid elevation 732 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert
🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 120 km of trail.

  • Trail Running Shoes 120 km of trail — cushioning that is still there in the last quarter.
  • Race Nutrition Past 120 km the palate quits before the legs do — carry more than one flavour.
  • Hydration Vests Flask capacity for 120 km, without the bounce.
  • Headlamps A 12 h limit puts you out there after dark.
  • Accessories Chafe and blisters end more 120 km races than fitness does.

Asics

Trabuco Max 3

★★★★★ 4.6

La Sportiva

Prodigio Pro

$225 ★★★★★ 4.6

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

Buff

CoolNet UV+ Multifunctional

UPF 50+ neck gaiter with cooling technology. Desert and sun essential.

$25 ★★★★★ 4.5
All gear guides →

Course Notes

A 120km course that meets the race standards for the Spartathlon. (118.4 km plus additional 1.6km at the end to achieve 120km needed for Spartathlon qualification.)

Similar races

Other 100K trail ultras, closest in distance first.