2 events in Saitama, Saitama

From big races to Saturday morning group runs—find 5k events and connect with the local endurance sports community.

• Saiko Eco-Marathon [finishers.com] [Register at finishers.com]
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  Sun, Oct 25, 2026

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  Get ready for the Saiko Ecomarathon, a unique sporting experience in October in Saitama Prefecture, Japan 🇯🇵. Specifically, you'll be starting in the city of Toda, along the picturesque Lac de Sai,...

  Get ready for the Saiko Ecomarathon, a unique sporting experience in October in Saitama Prefecture, Japan 🇯🇵. Specifically, you'll be starting in the city of Toda, along the picturesque Lac de Sai, in the Doman Green Park. Your race kicks off at 11:00 AM sharp! 🕚 You'll embark on a 10 km loop. If you're bringing your family, there's also a 5 km parent-child race. This route is also a loop 🔂. Enjoy a scenic course surrounded by lakes, ponds, and stunning nature 🍃. Immerse yourself in a peaceful and inspiring environment, perfect for setting a new personal best or just enjoying every step 💪.

  5k 10k Half Marathon Marathon Run

  Saitama, Saitama, Japan
  OpenStreetMap Google Maps
• Ecomarathon of Saïko in December [finishers.com] [Register at finishers.com]
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  Sun, Dec 27, 2026

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  Get ready for the Saïko Ecomarathon, a sporting experience in December in the heart of Saitama Prefecture in Japan 🇯🇵. It's precisely in the city of Toda, by the Lake Sai, in the Doman Green Park,...

  Get ready for the Saïko Ecomarathon, a sporting experience in December in the heart of Saitama Prefecture in Japan 🇯🇵. 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! 🕚 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 👨‍👩‍👧‍👦, a 5 km parent-child race is organized. The course also takes the format of a loop 🔂. You can enjoy a route surrounded by lakes, ponds, and magnificent nature 🍃. You will be immersed in a peaceful and inspiring environment, perfect for breaking your personal record or simply enjoying every stride 💪.

  5k 10k Half Marathon Marathon Run

  Saitama, Saitama, Japan
  OpenStreetMap Google Maps