2026 Shonan International Marathon

Name: 2026 Shonan International Marathon
Start: 2026-12-06
End: 2026-12-06
Location: Oiso, Japan

42K

Distances10K

BonusesScenic

Dec 6, 2026 · 1 day🇯🇵 Oiso, Japan

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Key FactsSold out

Entry

Standouts

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Run the flat Shonan coast on Dec 6, 2026 with Mt. Fuji and Enoshima views. First-come entry, 6.5-hour limit, plastic-free My Bottle race.

Why attend here

December along the Shonan coast means crisp, clear air and fewer crowds, making Oiso’s flat, sea-side course ideal for a late-year PR attempt. After the race, warm up with a bowl of shirasu-don (whitebait rice bowl) at a local seaside shack, then stroll the shoreline or soak in an onsen while watching the sun set over Sagami Bay.

Distance from you

From Columbus, US to Oiso, JP

~13.2h · 10,589 km

Oiso

typical Dec weather · 2025

6 Sat

11°0°

0mm2.6 m/s

Event Details

Elevation

50m

Course

Famously flat: an out-and-back along the Shonan shoreline and the West Shonan Bypass with only gentle road camber and a couple of bridge-ramp rises, which is why it draws PR-seekers.