The 1969 season proved to be the best of Sarna's career. She won a 200 metres/long jump double at the national championships. She was entered in three events for the 1969 European Athletics Championships in Athens: the long jump, 100 metres and the 4 × 100 metres relay. In the long jump, she again improved her best in championship competition and her mark of was enough to be the reigning Olympic champion Viorica Viscopoleanu and secure the first and only international gold medal of her career. She reached the semi-finals of the 100 m and ran the anchor leg of the relay to bring the team of Krystyna Mandecka, Danuta Jędrejek and Urszula Jóźwik to fifth in the final.