Catharina started her career in karting during 1997, moving up to Austrian Formula Ford in 2000.
Felser continued to advance her career, stepping up to German Formula Three in 2002, driving for the van Amersfoort and KMS teams.
She moved to the Trella team in 2003 before leaving the series and single-seater racing in 2004, joining the German Seat Leon Cupra Cup to drive the number 16 car.
In 2008 Catharina Felser drove a KTM X-Bow in the GT4 European Series for Team Reiter Engineering.
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