Shonan International Marathon

Road Running covering 10 km to 42.2 km with up to 90 m D+ in Oiso (Kanagawa Prefecture, Japan)

Location

Oiso, Kanagawa Prefecture, JapanShow on map(35.3067° N, 139.3114° E)

Date & StatusDecember 6, 2026Date confirmed

Elevation gainUp to +90 m

Shonan International Marathon is an endurance sporting event in Oiso, Kanagawa Prefecture, JP focused on Road Running. Key features include City Run, Culture & History.

The race program comprises 2 competitions, including Full Marathon (42.2 km, +90 m D+), and 10 km Run (10 km, +20 m D+). The next edition is officially confirmed for December 6, 2026. Official race regulations, course details, and registration information are provided on the organizer's website (shonan-kokusai.jp).

Official website

Shonan International Marathon in Oiso (Work: "Mount Fuji and Fog over Lake Yamanaka", Photo: Alpsdake, License: CC BY-SA 4.0, Source: Wikimedia Commons) — "Mount Fuji and Fog over Lake Yamanaka" · Photo: **Alpsdake** · Wikimedia CommonsCC BY-SA 4.0
Cropped to 16:9 (960 × 540 px), WebP · Shared under the same license

Event characteristics

City Run Culture & History

Races & distances (2)

Competition	Discipline	Distance	Elevation gain	Altitude range	Course type	Course & profile
Full Marathon	Road Running	42.2 km	+90 m	134 m - 172 m	Loop course	Route & profile
10 km Run	Road Running	10 km	+20 m	137 m - 145 m	Loop course	Route & profile

Course & Elevation Telemetry

Course route & map

Distance

42.2 km

Elevation gain

+90 m D+

Elevation loss

-90 m D-

Altitude range

134 m - 172 m

Gradient (Avg / Max)

0.4 % / 0.7 %

Course format

Loop course

42.2 km+90 m D+Peak 172 m

Start (S)Finish (F)DownhillFlatClimbSteep

Elevation profile & course telemetry

Altitude from 134 m to 172 m above sea level (+90 m D+, -90 m D-)

Peak: 172 m·at 18.4 km·Ø 0.4 %

Event Information & Answers

Frequently asked questions (FAQ)

When and where does Shonan International Marathon take place?

Shonan International Marathon takes place in Oiso, Kanagawa Prefecture, JP (start area at coordinates 35.3067° N, 139.3114° E). The next edition is officially confirmed for December 6, 2026.

What races and distances are offered at Shonan International Marathon?

The race program comprises 2 competitions, including Full Marathon (42.2 km, +90 m D+), and 10 km Run (10 km, +20 m D+). The competitions belong to Road Running.

What is the course layout and elevation profile for Shonan International Marathon?

The main competition (Full Marathon over 42.2 km) is designed as a loop course featuring +90 m of elevation gain and -90 m of elevation loss, ranging between 134 m and 172 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.

Where can I find registration and official race rules for Shonan International Marathon?

Official race regulations, course details, and registration information are provided on the organizer's website (shonan-kokusai.jp).