The 2004 American Le Mans Series season was the 34th season for the IMSA GT Championship, and the sixth under the American Le Mans Series banner.
The sprint event at Road Atlanta along with Circuit Trois-Rivières and the Miami, Florida street circuit were removed, while Mid-Ohio Sports Car Course and Portland International Raceway both returned once again.
The removal of Trois-Rivières rendered Mosport as the only race outside the United States.
Points are awarded to the top 10 finishers in the following order:[4] Exceptions were for the 4 Hour Monterey Sports Car Championships was scored in the following order: And for the 12 Hours of Sebring and Petit Le Mans which award the top 10 finishers in the following order: Cars failing to complete 70% of the winner's distance are not awarded points.
Teams only score the points of their highest finishing entry in each race.