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Ecomarathon of Saรฏko in December 2025

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The event in a few words

Get ready for the Saรฏko Ecomarathon, a sporting experience in December in the heart of Saitama Prefecture in Japan ๐Ÿ‡ฏ๐Ÿ‡ต. It's precisely in the city of Toda, by the Lake Sai, in the Doman Green Park, where you'll start at 11 AM sharp! ๐Ÿ•š Therefore, you're set for two races of your choice: a half-marathon or a 10 km, both in the format of a loop. If you came with family ๐Ÿ‘จโ€๐Ÿ‘ฉโ€๐Ÿ‘งโ€๐Ÿ‘ฆ, a parent-child race non-timed, 5 km is organized. The course also takes the format of a loop ๐Ÿ”‚. You can enjoy a route surrounded by lakes, ponds, and magnificent nature ๐Ÿƒ. You will be immersed in a peaceful and inspiring environment, perfect for breaking your personal record or simply enjoying every stride ๐Ÿ’ช.

With several other sporting events organized, especially in the prefectures of SaitamaOsakaHiroshimaKyoto and Kumamoto (but mainly in Tokyo ๐ŸŒธ), the Ecomarathon positions itself as an organization concerned about the environment ๐ŸŒณ and committed to various causes ๐ŸŽ—๏ธ. This year, it is possible to donate to the international refugee aid associationSecond Harvest Japan. Japan's first food bank, the organization is committed to ensuring everyone has access to food ๐Ÿฒ.

Despite its urbanization, the Saitama Prefecture remains significant for its agriculture. It includes vegetable ๐Ÿฅฆ, rice ๐Ÿš, and tea ๐Ÿต productions. There, you can taste the famous Sayama tea, Udon and Chichibu Soba, or Senbei from Sลka. Once youโ€™ve regained your strength, why not do some tourism ? Located in Omiya, the Hikawa Shrine is one of the oldest and most respected Shinto shrines in Japan. To learn more about Japanese culture ๐Ÿซฐ, the Saitama Prefectural Museum of Art is full of various collections of Japanese and Western art ๐Ÿ–ผ๏ธ. If you don't have time to extend your stay, the city of Toda also offers activities that will please you. For a great family outing, do not hesitate to visit the Tobu Zoo to admire its animals ๐Ÿผ and try its roller coasters ๐ŸŽก. If you're just passing by for the day, Tokyo, the capital of the country, is only 20 minutes away. Whether you are interested in traditional culture, fashion, cuisine ๐Ÿฅข, or simply the hustle and bustle of urban life, you're unlikely to get bored! ๐Ÿ˜‰

Don't miss this opportunity to combine sports, nature, and cultural discovery in a stunning region of Japan! ๐ŸŽ Sign up now and get ready to have an unforgettable experience at the Saรฏko Ecomarathon ๐ŸŽ.

4 reasons to join this race

Discover Japan ๐Ÿ‡ฏ๐Ÿ‡ต
If you have never been to Japan, running the Saiko Ecomarathon is the perfect opportunity to explore this country that blends tradition and modernity in all circumstances. If you decide to extend your stay, we invite you to explore the Saitama Prefecture. From Kawagoe Castle ๐Ÿฏ to the Tobu Zoo ๐Ÿผ and the Onsen ๐Ÿšฐ, these attractions are well-known.
Taste Japanese specialties ๐Ÿฑ
Here are some specialties you'll surely see if you pass by the street stalls ๐ŸŽ. Gokabo is one of the three main desserts of Saitama Prefecture. Sayama tea is a must in the region, and if you're lucky, you might even witness the famous tea ceremony ๐Ÿต.
Immerse yourself in Japanese culture ๐Ÿซฐ
Saitama Prefecture is very present in mangas and animes ๐Ÿ–ฅ๏ธ. Scenes from "My Neighbor Totoro" (Hayao Miyazaki) are set near Tokorozawa, the protagonist of the anime One Punch Man is named Saitama (where its author hails from), and the fictional worldโ€™s continent mirrors the shape of the prefecture ๐Ÿคฏ.
An easy, flat, and fast course โšก๏ธ
You might be surprised by the ease and speed of the 10 km course. Indeed, it is perfect for beginners and those hoping to break records ๐Ÿ†. If you aim to spend a Sunday with family, a parent-child race is organized for children under 15 ๐Ÿง‘โ€๐Ÿง‘โ€๐Ÿง’โ€๐Ÿง’.

A distance for every taste

Half Marathon

Road RunningThe most popular

Frequently asked questions (FAQ)

Bib pickup will be on-site on race day from 9 AM to 10:30 AM.

The races will start at 11 AM on December 28, 2025, at Doman Green Park.

  • Half Marathon: the time limit is 3 hours

  • 10 km: the time limit is 1 hour 30 minutes

  • Parent-child race: the race is not timed

You will find a designated area to store your luggage on-site (but no lockers, you will be entirely responsible for your valuables). Remember to bring a 45L garbage bag to protect your belongings in case of rain.

If you have any other questions, you can contact the organizers at the following email address: ecomarathon@runningtokyo.com

You can check the race rules here

Focus

Ecomarathon de Saรฏko
Ecomarathon de Saรฏko
Ecomarathon de Saรฏko
Ecomarathon de Saรฏko
Ecomarathon de Saรฏko