Name: Shimanto River Ultra Marathon Online Challenge [November Run 1-Month 100km] (四万十川ウルトラマラソン オンラインチャレンジ【November Run 1month 100km】)
Start: 2026-11-01
End: 2026-11-01

About the Event

Why not aim to finish alongside us, thinking of the Shimanto River, Japan's 'last clear stream'? Whether you've run the Shimanto River Ultra Marathon before, or have always dreamed of running it someday, we warmly welcome your participation. Entry fees vary by finisher gift tier. All tiers include a T-shirt. (T-shirt only ¥4,990; Shimanto udon noodles or long-sleeve T-shirt ¥6,990; pole-caught local bonito straw-seared tataki, or cap, or pants, or hoodie ¥8,990; Shimanto beef (sukiyaki-cut or yakiniku-cut) or Shimanto eel or original apparel set (cap, long-sleeve T-shirt, pants, hoodie) ¥12,990)

Races Offered

2month 100km Stage 1

Nov 01, 2026

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Distance — 100K

terrain

Type — Running

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80 days remaining

2month 100km Stage 2

Nov 01, 2026

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Distance — 100K

terrain

Type — Running

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80 days remaining

3month 100km

Nov 01, 2026

straighten

Distance — 100K

terrain

Type — Running

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80 days remaining

November Run 1month 100km

Nov 01, 2026

straighten

Distance — 100K

terrain

Type — Running

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80 days remaining

October Run 1month 100km

Nov 01, 2026

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Distance — 100K

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Type — Running

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80 days remaining

Training 1month 100km

Nov 01, 2026

straighten

Distance — 100K

terrain

Type — Running

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80 days remaining

Year-end 1month 100km

Nov 01, 2026

straighten

Distance — 100K

terrain

Type — Running

timer

80 days remaining

Weather History

These values represent the 3-year monthly averages for November in .

thermostat Temperature

2.0° / 10.8°

wb_sunny Feels like

-1.5° / 7.6°

light_mode Avg sunshine hours

8h 12m

water_drop Avg rainfall

2.0 mm

ac_unit Avg snowfall

—

air Avg wind speed

7.9 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Low (2.0)

humidity_mid Humidity

74.1%

wb_twilight Sunrise

06:20

nightlight Sunset

16:34

Hotels & Places to Stay

Runner Reviews

Read what other athletes have to say about their experience at the Shimanto River Ultra Marathon Online Challenge [November Run 1-Month 100km] (四万十川ウルトラマラソンオンラインチャレンジ【November Run 1month 100km】).

★ ★ ★ ★ ★