Colin Braun began racing at age six in Quarter Midgets in his home state of Texas. By age 14, Braun was racing in the National Auto Sport Association's Fran-Am1600 Pro Series, where he won Rookie-of-the-Year honors, eight of 11 races and a championship.
The following year Braun won eight races in a row and a second championship in the 2000 Formula TR Series.
In 2005, Braun advanced to the Grand-Am Sports Car Series presented by Crown Royal Special Reserve, where he drove for Krohn Racing. At just 16 years of age, he became the youngest ever Rolex Prototype driver.
The following year he took home his first Grand Am win at the Daytona 250 and collected win number two of the season at Barber Motorsports Park.
In 2007, Braun was signed to the Roush Fenway driver development program. He made his stock car debut driving the No. 99 Ford in the 2007 ARCA RE/MAX Series Gateway 150 at Gateway International Raceway.
Braun made five starts in the Nationwide series and earned 2 poles in 2008. He finished second to Kyle Busch as ORP.
In the 2008 Truck series Braun finished 13th in points and also won the Raybestos Rookie of the Year honors.
Braun only made one start in the Nationwide series in 2009. In the Truck series he placed 5th in points and won his first series race at Michigan.
