But since cyclo-cross is not an Olympic discipline, a necessary condition to be part of the curriculum, she switched to road and track cycling.

In Valkenburg, Netherlands, she finished 11th in the woman junior's time trial during the 2012 UCI Road World Championships.

[13] After competing in the time trial and road race at the Olympic Games in Rio de Janeiro, she won the youth classification of the Lotto Belgium Tour in September.

Lotte Kopecky and Jolien D'Hoore managed to win the golden medal in the Madison discipline at the 2017 UCI Track Cycling World Championships, after they won the European title in 2016.

[14] Kopecky dominated the 2017 national track championships, winning the Omnium, Scratch and Points race.

[19] Lotte Kopecky participated in the 2020 Summer Olympics in Tokyo, finishing 4th in the individual road race.

[20] Kopecky signed with the prestigious SD Worx team in June 2021, believing that she would be surrounded by stronger cyclists.

And like the year before, Kopecky managed to win both the national time trial and road race championship.

On 13 August 2023 Kopecky won the Road Race at the World Championships in Balloch, Great Britain.

[34] On national level, in the Vlaams Wielercentrum Eddy Merckx, she became Belgian champion in the Individual pursuit, Points race, Omnium, Elimination and Madison (with Shari Bossuyt).

Despite the French doping agency acknowledging that the use of letrozole metabolite was not intentional, her partner Shari Bossuyt was suspended for 2 years.

[42] After winning the general and mountains classifications in the Tour de Romandie, Kopecky won the Time trial at the UEC European Championships.

[43] In the final lap she experienced several difficult moments uphill, but she could handle her race tactically and win the sprint finish.