Klaudia Kazimierska

Background

Running for her local club LKS Vectra in Włocławek, Klaudia got her first taste of international success as a 15-year-old athlete, when won the silver medal over 1500m at the European Youth Olympics Festival in Hungary. A year later, Klaudia won the bronze medal in the 1500m at the European U18 Championships in Hungary and doubled in both the 1500m and 4km cross-country race at the Youth Olympic Games in Buenos Aires.

In 2020, Klaudia finished second in the 1500m at the Polish Championships and the following year finished seventh in the European U23 Championships in Estonia. In the fall of 2022, Klaudia moved to Eugene, Oregon and started her collegiate career with the Oregon Ducks. In her first season at Oregon, Klaudia finished sixth in the mile at the NCAA Indoor Championships and fourth in the final of the 1500m at the NCAA Outdoor Championships. The next year proved to be a breakout season for Klaudia: after a third-place finish at the NCAA Outdoor Championships, Klaudia qualified for the Olympic Games in Paris, where she finished tenth in the final of the 1500m in a new lifetime best of 4:00.12, a time that she bettered two weeks later at the Skolimowska Memorial Diamond League meeting in Silesia, running 3:59.95 for sixth.

Returning to Oregon, injuries hampered her senior year, however, after turning professional that summer, Klaudia was named to the Polish team for the World Athletics Championships in Tokyo, where Klaudia finished seventh in the final of the 1500m, in another new lifetime best of 3:57.95.

In 2026, Klaudia's first full season as a professional, proved to be when made the leap to the next level. Following an indoor season that saw her break Polish national records at 1500m and the mile and earn a sixth-place finish in the final of the 1500m in front of a home crowd in Torún, Poland, Klaudia proved to be a consistent threat on the Diamond League circuit, with top finishes in Diamond League competition in Rome, and Eugene before earning the silver medal over 1500m at the European Championships in Birmingham. After Birmingham, Klaudia raced at the Silesia Diamond League where she ran 3:55.59 to smash the national record for 1500m in front of 70,000 Polish fans. Just two weeks later, Klaudia again re-wrote the record books, winning the Wanda Diamond League final over 1500m in Brussels in 3:54.05, yet another new Polish national record. The following week, Klaudia bested another stellar field in the 1500m at the World Athletics Ultimate Championships, and once more again five days later at ATHLOS London, where she capped off a storybook season with a win in the women's mile.

An avid Taylor Swift fan, when Klaudia isn’t racing around the world, she enjoys spending time with her cat, Klu.