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Minamiaso Caldera Trail

Name: Minamiaso Caldera Trail
Start: 2025-12-20
End: 2025-12-20
Location: Minamiaso

Minamiaso, Kumamoto, Japan

calendar_today 20 Dec, 2025

directions_run Running

language Official Website

About the Event

Conquer a trail running masterpiece at the Minamiaso Caldera Trail, a premier winter event set within the majestic expanse of the world's largest caldera in Aso-Kuju National Park. This ITRA-certified race, serving as a UTMB World Series Qualifier for its 50km course, offers an unparalleled challenge across four stunning distances: 50km, 30km, 18km, and a 2km fun run. Test your limits on a course that winds through the silent, snowy landscapes of Minamiaso Village, where breathtaking volcanic vistas and pristine nature provide a truly epic backdrop. With guest runners and a vibrant festival atmosphere, it's more than a race—it's a destination adventure for the global trail community. Secure your spot for a world-class running experience that defines the spirit of Japanese mountain endurance.

Races Offered

18km

Dec 20, 2025

straighten

Distance — 18K

terrain

Type — Running

timer

-258 days remaining

2km

Dec 20, 2025

straighten

Distance — 2K

terrain

Type — Running

timer

-258 days remaining

30km

Dec 20, 2025

straighten

Distance — 30K

terrain

Type — Running

timer

-258 days remaining

50km

Dec 20, 2025

straighten

Distance — 50K

terrain

Type — Running

timer

-258 days remaining

Weather History

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

thermostat Temperature

1.0° / 9.9°

wb_sunny Feels like

-2.1° / 6.3°

light_mode Avg sunshine hours

7h 33m

water_drop Avg rainfall

2.0 mm

ac_unit Avg snowfall

0.1 cm

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

78.4%

wb_twilight Sunrise

07:10

nightlight Sunset

17:12

About Minamiaso

Learn more about the host city, Minamiaso.

Minamiaso is a village in Aso District, Kumamoto Prefecture, Japan. As of 31 July 2024, the village had an estimated population of 10,071 in 4821 households, and a population density of 73 persons per km2. The total area of the village is 137.32 km2 (53.02 sq mi).

Runner Reviews

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Nearby Races

Explore other exciting events happening in this same region.

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8th Mifune Jurassic Trail (第8回御船ジュラシックトレイル)

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Kumamoto Castle Marathon 2027 [Full Marathon, Fun…

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calendar_today Feb 21, 2027

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Minamiaso Caldera Trail

About the Event

Races Offered

18km

2km

30km

50km

Weather History

About Minamiaso

Hotels & Places to Stay