It was a series for Le Mans Prototypes (LMP) and Grand Tourer (GT) race cars divided into four classes: LMP1, LMP2, GT1, and GT2.
The Lone Star Grand Prix was originally scheduled to take place on April 26.
† - Frank Biela and Emanuele Pirro were both penalized three championship points for their entry making avoidable contact during Round 4.
† - Sascha Maassen and Patrick Long were both penalized three championship points for their entry making avoidable contact during Round 2.
The ALMS was the first motorsport racing series in North America to be recognized by the United States Environmental Protection Agency (the EPA), the United States Department of Energy and the Society of Automotive Engineers (SAE International) to be recognized as a "Green Racing Series", and these three will take part organizing the challenge.