Shimanto, Kochi Pref., Japan · Sunday, October 18, 2026

Fixed Distance 100K

River Shimanto 100km

45 days away
100 km Distance
700 m Climbing
6.1 Grit · Hardcore
Register with organiserRegister ↗ Add to calendar
32.9912° N, 132.9337° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 7 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.
Time limit 14 hours 8:24 min/km average. Comfortable. Room to walk the climbs and stop at aid. Tighter than 85% of 100K races. Measured against 203 races of the same distance. Cut-off calculator →
Field size ~1,008 Very large. Congested start, busy aid stations.

DUV results for the 2025 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, October

Daytime high 23°C
Night low 18°C
Rainfall Wet — expect rain
Daylight 11 h 19 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 112 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

By UltraHub Expert
👟 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 100 km of trail with 700 m of ascent.

  • Trail Running Shoes 100 km of trail — cushioning that is still there in the last quarter.
  • Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
  • Hydration Vests Flask capacity for 100 km, without the bounce.
  • Headlamps A 14 h limit puts you out there after dark.
  • Accessories Chafe and blisters end more 100 km races than fitness does.

Salomon

Ultra Glide 4

$159.95 ★★★★★ 4.6

Salomon

Aero Glide 4 Grvl

$159.95 ★★★★★ 4.5

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

Eine fast geschlossene große Runde entlang Shimanto River (Start: Warabioka Junior High School, Ziel: Kochi Kenritsu Nakamura High School), die ersten 20km stetig bergan (0 bis 650m ü.N.N.)

Similar races

Other 100K trail ultras, closest in distance first.