Switzerland·2026

Winterthur

Winterthur straddles the Töss river in the foothills north of Zurich, offering runners flat valley circuits and hillier options toward the surrounding ridges. The Marathon de Winterthur and Grand Prix Winterthur use the riverbank and town loops; the Rundweg Winterthur Ultra extends 61km as a tougher perimeter route. Cyclists dominate here—the Winticrit circuit race and local Radcross Illnau cross event anchor a strong grassroots scene, while Winterthur sits on the Tour de Suisse route corridor between Alpine valleys, making it a natural hub for road racing and gravel riding across the Zurich uplands.