The 100 km is one of running's great milestones — a number that means something the moment you say it out loud. Sitting at the heart of the ultra world, it's far enough to demand serious respect yet established enough to have its own racing culture and records. This page collects every upcoming 100 km race across Central and Eastern Europe, with dates, locations, organisers and direct online-registration links.
Racing 100 kilometres is a lesson in pacing, nutrition and mental endurance. Success comes not from speed but from steady discipline, smart fuelling and the willingness to keep moving when it gets hard. Whether on closed road loops or mixed terrain, finishing a 100K places you among a committed group of endurance athletes — and the sense of achievement is unmatched.
Choose the 100K that fits your experience, then sign up in a few clicks. Every listing includes the start date, location, organiser and a secure registration link, so you can plan your big goal with confidence.
The calendar refreshes daily, so you always see the current 100 km races in Ukraine, Poland, Romania and neighbouring countries. Train with purpose and let Startlek help you find the 100K that defines your season.