runfarwhere
Trail · 105K

Fun Trails Chichibu & Okumusashi

· starts 5:00 AM
Chichibu, Saitama, Japan

WSER Qualifier
The race's site ↗Course map ↗

Fun Trails Chichibu & Okumusashi is a trail race of 65 miles (105 km) in Chichibu, Saitama, Japan. The next edition is on Saturday, November 14, 2026, starting at 5:00 AM. The race gives its climbing as 27,234 ft (8,301 m). It starts at 966 ft (294 m) above sea level. Its high point is 3,142 ft (958 m). The course finishes where it starts. It's a Western States 100 qualifier. Registration is open to all. The field is about 400 runners.

There are 5 other upcoming 50-mile and 100K races in Japan. Fun Trails Chichibu & Okumusashi climbs about 417 ft a mile (79 m per km), steeper than 100% of the 119 50-mile and 100K races listed with their climbing.

66miDistance
27,234ftClimbing
400runnersField
66°Flow 46°FTypical race day

The course

66miMeasured distance
—Aid stations
27,234ftMeasured climb
27,234ftDescent
3,142ftHigh point
404ftLow point

Questions about Fun Trails Chichibu & Okumusashi

When is Fun Trails Chichibu & Okumusashi 2026?

Fun Trails Chichibu & Okumusashi 2026 is on Saturday, November 14, 2026, starting at 5:00 AM local time.

Where is Fun Trails Chichibu & Okumusashi?

Fun Trails Chichibu & Okumusashi is held in Chichibu, Saitama, Japan.

How long is Fun Trails Chichibu & Okumusashi?

Fun Trails Chichibu & Okumusashi is 65 miles (105 km); its course file measures 66 miles.

How much elevation gain does Fun Trails Chichibu & Okumusashi have?

Fun Trails Chichibu & Okumusashi has 27,234 ft (8,301 m) of elevation gain, as the race states it.

Is Fun Trails Chichibu & Okumusashi a Western States qualifier?

Yes. Fun Trails Chichibu & Okumusashi 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 Fun Trails Chichibu & Okumusashi?

Fun Trails Chichibu & Okumusashi has open registration.

What is the weather usually like at Fun Trails Chichibu & Okumusashi?

Around Fun Trails Chichibu & Okumusashi's date, the day's high is typically about 66°F (19°C) and the low about 46°F (8°C), averaged over recent years.

Where can I see the Fun Trails Chichibu & Okumusashi elevation profile and aid station cutoffs?

runfarwhere has Fun Trails Chichibu & Okumusashi'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 Fun Trails Chichibu & Okumusashi?

Fun Trails Chichibu & Okumusashi climbs about 417 ft a mile (79 m per km), steeper than 100% 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 Okushinano (June 2027, date TBD), Kaga Spa Trail by UTMB (June 13, 2027) and OSJ Ontake (July 2027, date TBD).

Other races in Japan

Every race in Japan

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