The American Le Mans Series (ALMS) offers fans around the world gripping racing with fascinating sports prototypes and sports cars. Highlights on the calendar are the long distance classics like the Sebring 12 Hours and Petit Le Mans in Road Atlanta. The regulations correspond to those of the Le Mans 24 hour race.

All race cars start together but are classified separately. This ensures racing that is exciting and constantly changing. Points are awarded only for placings in each class.

At each race and in each class points are awarded for the 10 best-placed drivers, teams, manufacturers (chassis and engine) and tyre supplier according to the following scheme:

Races under 4 hours:
20-16-13-10-8-6-4-3-2-1

Races between 4 and 8 hours:
24-20-17-14-12-10-8-7-6-5

Races over 8 hours:
24-20-17-14-12-10-8-7-6-5

The champion is announced for every class.

Created in 1999, the race series is the world leader in "green racing". All teams with petrol-powered vehicles must refuel with petrol containing at least 10 percent of bioethanol.

In the American Le Mans Series, sports prototypes and sports cars compete in five different classes, that start together but are classified separately.

This most popular class amongst car manufacturers is traditionally very well supported: Slightly modified standard sports cars with 440 to 500 hp and a minimum weight of 1.245 kilograms (e.g. Porsche 911 GT3 RSR).

This class is reserved for vehicles from one-make race series (e.g. Porsche 911 GT3 Cup).

Sports prototypes with up to550 hp and a minimum weight of 900 kilograms

Sports prototypes with ca. 440 hp

Prototype brand trophy series for the ORECA FLM 09.

This environmental competition challenges all ALMS prototypes and GT entries in the field to race to the green. The title is awarded to the vehicle that demonstrates the best overall performance and fuel efficiency.