Czech cold-water swimmers have set a new world record for the largest polar bear dip. A total of 2,461 took part in the attempt in the Most lake in northwest Czech Republic.

Researchers use remote camera footage and satellite collars to gain new insights into polar bear denning behavior and cub survival. The denning period is the most critical time in a polar bear’s life.

Some of 2461 polar swimmers get out of the water after breaking a world record for the largest polar bear dip at a lake in Most, Czech Republic, Saturday, March 1, 2025. (AP Photo/Petr David Josek ...

The previous record was 1,799 swimmers who participated in the polar bear dip in Mielno, Poland, on the Baltic Sea on Feb. 15, 2015, according to Guinness World Records.

PRAGUE (AP) — Czech cold-water swimmers on Saturday set a new world record for the largest polar bear dip. A total of 2,461 participants were involved in the successful attempt on the Most lake ...