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11th Minami Boso 100km and 75km Michikusa Ultra Marathon (第11回南房総100km・75kmみちくさウルトラマラソン)

Name: 11th Minami Boso 100km and 75km Michikusa Ultra Marathon (第11回 南房総100km・75kmみちくさウルトラマラソン)
Start: 2027-03-13
End: 2027-03-13
Location: Katsuura

Katsuura, Chiba, Japan

calendar_today 13 Mar, 2027

directions_run Running

language Official Website

sell $101.12 – $126.40

About the Event

One of the most popular races in the Michikusa series, this ultra covers the sea and mountains of Minami Boso over 100km and 75km. The course follows a beautiful coastline, and the event is known for its warm-hearted and delicious aid stations. Staff and volunteers from the host area are ready to welcome runners.
The 100km costs 20,000 yen and the 75km 16,000 yen.

Races Offered

100km

Mar 13, 2027

straighten

Distance — 100K

terrain

Type — Running

timer

151 days remaining

sell

$126.40

75km

Mar 13, 2027

straighten

Distance — 75K

terrain

Type — Running

timer

151 days remaining

sell

$101.12

Weather History

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

thermostat Temperature

7.5° / 14.4°

wb_sunny Feels like

2.6° / 10.7°

light_mode Avg sunshine hours

7h 30m

water_drop Avg rainfall

6.6 mm

ac_unit Avg snowfall

—

air Avg wind speed

17.6 km/h (Gentle breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (4.0)

humidity_mid Humidity

70.3%

wb_twilight Sunrise

05:48

nightlight Sunset

17:46

Things to Do Nearby

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Runner Reviews

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11th Minami Boso 100km and 75km Michikusa Ultra Marathon (第11回南房総100km・75kmみちくさウルトラマラソン)

About the Event