第5回 荒川エコマラソン（堀切エリア） 2026

The Arakawa Eco-Marathon, held in the Horikiri area, is a low-impact running event focused on environmental protection during competition. The event features a half marathon, a 10K, and a 5K fun run, with the 5K offering both solo and parent-child divisions. The course is flat, making it suitable for runners aiming for personal bests and for beginners seeking a simple first race. Its distinctive eco-friendly rules include using bicycles to lead runners instead of cars, powering the event with solar energy, and reusing race bibs.