In a remarkable display of endurance, Bartlomiej Kubkowski swam an astonishing 160 kilometers continuously across the Baltic Sea, achieving this incredible milestone in 55 hours and 10 minutes. After four previous attempts without success, his persistence finally bore fruit, helping to raise nearly $190,000 for children battling cancer. This achievement signifies a noteworthy moment in the annals of marathon swimming history.
Polish ultra-swimmer Bartlomiej Kubkowski has accomplished what no one had before, becoming the first person to complete an unassisted, non-stop swim across the Baltic Sea from Kåseberga, Sweden, to Dziwnów, Poland. Covering approximately 160 kilometres (100 miles) in 55 hours and 10 minutes, Kubkowski remained in the water throughout the journey without sleeping, taking breaks or touching a support boat. The achievement came after four unsuccessful attempts over five years and has been hailed as one of the greatest feats in modern marathon swimming. Beyond setting a historic record, the endurance challenge also raised nearly $190,000 for children battling cancer through Poland’s Cancer Fighters Foundation.
How Bartlomiej Kubkowski swam 100 miles without sleep, breaks or boat assistance
Kubkowski began his swim from the Swedish coastal village of Kåseberga and finished in Dziwnów, Poland, after more than two days in the water. He completed the 160-kilometre crossing in 55 hours and 10 minutes, becoming the first swimmer to finish the route under internationally recognised unassisted marathon swimming rules.Although a support boat followed him throughout the crossing for safety, Kubkowski never touched it, climbed aboard or received any physical help. Instead, food and drinks were passed to him while he remained in the water, allowing him to continue swimming without violating the rules.
What made the Baltic Sea crossing so challenging?
The Baltic Sea is one of Europe’s most demanding open-water environments. Even during summer, the water can remain cold, while shifting winds create powerful waves and unpredictable currents that constantly push swimmers off course.Kubkowski also had to cope with complete sleep deprivation. Swimming continuously for more than 55 hours placed enormous physical and mental stress on his body. Reports said he experienced hallucinations during the latter part of the journey, a known effect of prolonged exhaustion and lack of sleep.
