The 5 km open-water swim is a serious endurance event — a distance that demands real preparation, pacing and mental focus. It's where open-water swimming becomes a genuine test of stamina, set in the lakes, rivers and seas of Central and Eastern Europe. This page gathers every upcoming 5 km open-water swim, with dates, locations, organisers and direct online-registration links.
Covering five kilometres in open water means managing your effort, your nutrition and the conditions over a long, continuous swim. Cold water, chop and the openness of a natural venue strip away every comfort of the pool — and replace them with a deep, elemental connection to the water that keeps swimmers coming back. It's a rewarding goal for experienced open-water athletes and long-course triathletes.
Pick the 5 km swim that fits your experience and register in a few clicks. Each listing includes the start date, location, organiser and a secure registration link.
The calendar refreshes daily, so you always see the current 5 km open-water swims in Ukraine, Poland, Romania and neighbouring countries. Train your endurance and let Startlek help you find your next big swim.