Carl Harr started his racing career out west, winning multiple events at Edmonton International Speedway and in NHRA drag racing in the 1970s, before winning multiple slalom and rally events run by the Northern Alberta Sports Car Club in the 1980s. He joined the Players GM Challenge Series in 1986, running full-time until 1992.

He then shifted to national stock car racing from 1994 to 2010. He started 80 races between the CASCAR Super Series, CASCAR West, CASCAR East and NASCAR Pinty’s Series since 1998, recording 32 top-five finishes, four CASCAR West wins and a CASCAR West championship during that span. He also made 78 starts in the NASCAR K&N Pro Series West between 2001 and 2014.

Harr founded the Edmonton Corvette Club in 1979 and has spent one season each as a team owner in the NASCAR Xfinity Series and the Pirelli World Challenge.