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UltraJapanNagano Prefecture

OSJ KOUMI100 2027

10.10 – 11.10.2027Koumi Town, Nagano (Japan)Dates to be confirmed
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1 course · 165 km102.5 mi

At a glance

OSJ KOUMI100 2027 is expected from Sunday 10 to Monday 11 October 2027 in Koumi Town, Nagano (Nagano Prefecture, Japan), date to be confirmed by the organiser. One distance: 165 km.

The course is 165 km with 7’916 m D+ (48 m per km: mountain terrain).

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A 100-mile race consisting of 5 laps of a 33km course around Matsubara Lake and Inako-yu in Koumi Town, Yatsugatake.
From the organiser

1 course

  1. 165km102.5mi

    7’916 m D+25’971 ft D+

    avg 5%

    100 Miles
    ITRA 6

GPX trace not yet published.

Race plan

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Pacing, aid stations and fueling timed to your effort on OSJ KOUMI100, in one roadbook.

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Start

Koumi Town, Nagano (Japan)

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Where to stay

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