第14回榛名湖マラソン 2026

The Haruna Lake Marathon is a September full marathon held around Lake Haruna in Takasaki, Gunma Prefecture. Its defining characteristic is altitude; organizers state it is Japan's highest certified full marathon course. This is a lake-loop race in highland air, distinct from a flat city marathon. Runners complete laps around the lakeside course, viewing Lake Haruna and the surrounding uplands. The race records and issues times for each lap, providing participants with a record of their progress even if they do not finish the full marathon distance.