runfarwhere
Trail · 100K

OSJ Ontake

· starts 5:00 AM
Otaki, Nagano, Japan

WSER Qualifier
The race's site ↗Course map ↗

OSJ Ontake is a trail race of 62 miles (100 km) in Otaki, Nagano, Japan. The next edition is in July 2027; its day hasn't been announced. The race gives its climbing as 9,032 ft (2,753 m). It starts at 2,936 ft (895 m) above sea level. Its high point is 5,528 ft (1,685 m). The course finishes where it starts. It's a Western States 100 qualifier. Registration is open to all. The field is about 200 runners.

There are 5 other upcoming 50-mile and 100K races in Japan. OSJ Ontake climbs about 145 ft a mile (28 m per km), flatter than 85% of the 119 50-mile and 100K races listed with their climbing.

62miDistance
9,032ftClimbing
200runnersField
75°Flow 60°FTypical race day

The course

62miMeasured distance
—Aid stations
9,032ftMeasured climb
8,980ftDescent
5,528ftHigh point
2,907ftLow point

Questions about OSJ Ontake

When is OSJ Ontake 2027?

OSJ Ontake 2027 is in July 2027; its day hasn't been announced yet.

Where is OSJ Ontake?

OSJ Ontake is held in Otaki, Nagano, Japan.

How long is OSJ Ontake?

OSJ Ontake is 62 miles (100 km).

How much elevation gain does OSJ Ontake have?

OSJ Ontake has 9,032 ft (2,753 m) of elevation gain, as the race states it.

Is OSJ Ontake a Western States qualifier?

Yes. OSJ Ontake is on the Western States 100's list of qualifying races. Check wser.org for the qualifying standard and years.

How do you get into OSJ Ontake?

OSJ Ontake has open registration.

What is the weather usually like at OSJ Ontake?

Around OSJ Ontake's date, the day's high is typically about 75°F (24°C) and the low about 60°F (15°C), averaged over recent years.

Where can I see the OSJ Ontake elevation profile and aid station cutoffs?

runfarwhere has OSJ Ontake's course file. The outline, distance and climbing are free on its page; the elevation profile, aid stations with cutoffs and the GPX file are part of runfarwhere Premium.

How hilly is OSJ Ontake?

OSJ Ontake climbs about 145 ft a mile (28 m per km), flatter than 85% of the 119 50-mile and 100K races listed with their climbing.

What other 50-mile and 100K races are there in Japan?

Other upcoming 50-mile and 100K races in Japan include Fun Trails Chichibu & Okumusashi (November 14, 2026), Okushinano (June 2027, date TBD) and Kaga Spa Trail by UTMB (June 13, 2027).

Other races in Japan

Every race in Japan

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