Challenge Almere Amsterdam, The Netherlands

Challenge Almere-Amsterdam is a legendary Dutch triathlon held on 13 September 2025, offering Long (3.8 km swim, 180 km bike, 42.2 km run) and Middle (1.9 / 94 / 21.1 km) distances. Uniquely staged below sea level, this fast and flat course through Almere’s polders pushes athletes to their limits while celebrating Europe’s oldest LD triathlon tradition.

Challenge Almere‑Amsterdam is Europe's historic long-distance triathlon, returning on 13 September 2025. Set entirely below sea level on reclaimed land, it offers two mains events: the 3.8 km swim in Weerwater, 180 km bike through flat polders, and a 42.2 km marathon—or the shortened middle-distance format (1.9 / 94 / 21.1 km). With fast, wind‑blown terrain and a vibrant finish on the Esplanade, it attracts elite European Championship contenders and enthusiastic age-group athletes alike. In 2025, the race hosts both Age‑Group and Elite Europe Triathlon Long Distance Championships, with elevated stakes and prize money (€50,000), all supported by a long-term partnership with Rabobank.