MarathonRoad🇯🇵 Oiso, Japan

Shonan International Marathon

Sunday, 6 December 2026In 56 days · Start 09:00

Runs on the closed Seisho/Shonan coastal bypass from Oiso to a turn near the entrance to Enoshima, then back past Oiso to a second turn at Ninomiya, finishing at the Oiso Prince Hotel. Sea views and, on clear days, Mt. Fuji.

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Facts checked 11 Oct 2026 against shonan-kokusai.jp, shonan-kokusai.jp.

Elevation gain

60 m

Flat · ↓ 60 m

Highest point

15 m

above sea level

Temp at start

8°C

Peaks around 13°C

Entry fee

≈ $105

Open entry

Finishers

—

typical year

Course

Out and back

6.5h cut-off

Getting thereFly into HND (Tokyo), about 51 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Flat: about 60 m of climbing and 60 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start

8°C

Peak during race

13°C

Humidity

63%

Chance of rain

Wind

13 km/h

Race day in past years

Historical averages for 6 December ±3 days, 2016–2025, from 09:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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<a href="https://irun42.com/race/shonan" title="Shonan International Marathon on iRun42"><img src="https://irun42.com/badge/shonan.svg" width="300" height="120" alt="Shonan International Marathon: course, elevation and race-day weather on iRun42" /></a>