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Shonan International Marathon

calendar_today 06 Dec, 2026

directions_run Running

language Official Website

sell $135.23

Shonan International Marathon

About the Event

Immerse yourself in the breathtaking beauty of Japan’s Shonan coast for the Shonan International Marathon. This unique race invites non-Japanese residents living in Japan and international participants to experience one of the world's most scenic marathon routes. The event starts and finishes in Oiso, a historic seaside resort town just an hour south of Tokyo by train.
Runners will be treated to stunning vistas as they traverse pristine beaches with Mt. Fuji towering majestically on the horizon. Alongside some of Japan’s premier tourist destinations like Kamakura and Hakone, participants can soak up centuries of history and culture while enjoying a challenging yet rewarding course.
What sets this marathon apart is its commitment to environmental sustainability. Shonan International Marathon was the first major race in the world to achieve zero waste from drink stations by encouraging runners to bring their own bottles or cups. In 2025, they reduced event waste by an impressive 76%, a feat that garnered overwhelming support and appreciation among participants.
With over 200 aid stations strategically placed along the route, this innovative approach not only ensures a clean course but also promotes eco-friendly practices within the running community. The Shonan International Marathon is more than just a race; it’s an experience where runners can cherish memories while contributing to a greener future.

Races Offered

42.20km

Dec 06, 2026

straighten

Distance — 42.2K

terrain

Type — Running

timer

154 days remaining

sell

$135.23

Weather History

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

thermostat Temperature
3.7° / 13.0°
wb_sunny Feels like
0.5° / 9.9°
light_mode Avg sunshine hours
7h 49m
water_drop Avg rainfall
1.2 mm
ac_unit Avg snowfall
air Avg wind speed
7.4 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
64.2%
wb_twilight Sunrise
06:43
nightlight Sunset
16:32

About Oiso

Learn more about the host city, Oiso.

Scenic view of

Ōiso is a town located in Kanagawa Prefecture, Japan. As of 1 January 2023, the town had an estimated population of 31,262 and a population density of 1820 persons per km². The total area of the town is 17.18 square kilometres (6.63 sq mi).

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Hotels & Places to Stay

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