5xim Tower Triathlon Challenge Poland 2026

The 5xIM Tower Triathlon Challenge Poland is a small ultra triathlon in Poland, limited to 10 participants. The race begins with swimming on a Wednesday morning; registration opens in January. Its full distance comprises five times an Iron-distance triathlon: 19 km swimming, 900 km cycling, and 211 km running. This is not a typical long-course triathlon with a large field and crowds moving through transition. It is designed for a select group of ultra-endurance athletes capable of managing multi-day racing and support logistics. The key distinction is that it is the only race in Poland offering double and triple Iron distances, with the 5xIM option exceeding both.