EcoMarathon Futakotama d'Octobre
⚠️ 2027 edition: provisional information
The date is estimated from the 2026 edition (October 25, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.
Available distances
Races on the programme
| Race | Distance | Start |
|---|---|---|
| Semi-Marathon | 21.1 km | 11:00 |
| Course sur route 10 km | 10 km | 11:00 |
| Course sur route 5 km | 5 km | 11:00 |
About
The EcoMarathon Futakotama d'Octobre takes place on 25 October 2026 at Tamagawa, in Tokyo's Setagaya ward, on a flat, fast waterside course. Three events are on offer: a half marathon (21.1 km), a 10 km and a 5 km parent-and-child race open to under-15s, all with a shared 11am start and a cap of 300 participants in total.
The event is run by an organisation involved in several charitable causes across Japan, including in Tokyo, Saitama, Osaka, Hiroshima, Kyoto and Kumamoto. Entrants can replace their entry fee with a donation, and funds raised go to Second Harvest Japan and to an international refugee support organisation.
Highlights
- Park
- City
- Lakes and ponds
- Big city
- Kids' races
Prepare for EcoMarathon Futakotama d'Octobre with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
- Strava and Garmin sync: your sessions are analyzed and the plan adapts
- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Tamagawa.
Ecomarathon Nikotama
Jan 17, 2027 · Tokyo · 4 km away
21.1 km · 10 km · 5 km
しながわシティラン
Mar 14, 2027 · Tokyo · 6 km away
10 km · 2 km · 1 km
Ecomarathon Nikotama d'Avril
Apr 11, 2027 · Tokyo · 12 km away
21.1 km · 10 km · 5 km
Fuji Trail Challenge
Sep 3, 2027 · Tokyo · 12 km away
50 km · 29 km · 12 km · 6 km
Marathon de Tokyo
Mar 7, 2027 · Tokyo · 14 km away
42.2 km · 10.7 km
横浜マラソン
Oct 24, 2027 · Yokohama · 16 km away
42.2 km · 7 km