# Czech cold-water swimmers set world record with 2,461-person polar bear dip

*By IO Digest Desk*

A mass plunge into near-freezing water in northwest Czech Republic set a new benchmark for winter swimming on event date 2025-03-01, when 2,461 people entered Most lake to establish a world record for the largest polar bear dip. The supplied AP extract says the previous Guinness World Records mark was 1,799 swimmers, achieved in Mielno, Poland, in February 2015 [Source 3786].

The scale of the new record is striking because the attempt was not just a matter of attendance. Guinness rules required participants to wear bathing suits, remain at least waist-deep in the water and stay there together for at least one minute. The lake water measured 3.5C, comfortably below the 10C ceiling needed for the attempt to qualify. In other words, the record depended on precise conditions and compliance as much as on raw turnout [Source 3786].

Most lake became the centre of a highly choreographed exercise in endurance and spectacle. AP’s account makes clear that this was not an improvised local gathering but a carefully organised record attempt, one that converted cold-water swimming culture into a public event with measurable rules, official thresholds and a visible collective payoff. The result was a jump of more than 600 participants beyond the old record, a sizable increase for a category that already demands unusual tolerance for cold [Source 3786].

Organiser David Vencl used the occasion to make a broader claim about the country’s sporting culture, saying “Czechs are a nation of polar swimmers.” The extract adds that Vencl is himself a record-holder, having set a world best four years earlier in men’s swimming under ice with a distance of 80.9 metres. That detail suggests the event was shaped by a local community that treats extreme cold-water performance as a serious discipline rather than a novelty stunt [Source 3786].

The numbers help explain why this particular plunge resonated. Winter swimming is often an individual challenge, associated with personal toughness, health rituals or niche sporting communities. A record attempt of 2,461 people turns that solitary image into a mass-participation scene. The conditions still demanded individual commitment, but the achievement depended on people enduring the cold at the same time, in the same water and under the same rules [Source 3786].

What the supplied evidence confirms is straightforward and sufficient: the attempt succeeded, the headcount reached 2,461, the temperature met the standard and the previous record was surpassed by a wide margin. Beyond that, the event stands as a picture of how local identity, record culture and physical hardship can combine into a single spectacle. On the evidence provided by AP, Most did not merely host another winter swim. It staged the largest officially recognised polar bear dip yet recorded, and did so under conditions cold enough to make the number meaningful rather than symbolic [Source 3786].