【東京荒川】THE CHALLENGE RACE 39｜日本陸連公認レース 2026

THE CHALLENGE RACE 39, situated along the Arakawa in Itabashi ward, is structured as a time trial, not a casual event. It is a Japan Association of Athletics Federations certified race, described as "Japan's fastest course" with "within 2m of elevation difference." This course offers no respite from pacing: it is flat, fast, and straightforward. A notable feature is the pacer system, with 12 groups starting every 10 minutes, organizing the day around runners aiming to maintain a target pace to the finish.