[1] It was the tenth consecutive year the event was held as part of the American Le Mans Series.
[2] The race was held at the seven-turn 1.530 mi (2.462 km) Lime Rock Park in Lakeville, Connecticut on July 6, 2013.
[2] Before the race, Klaus Graf and Lucas Luhr led the P1 Drivers' Championship with 62 points, 4 ahead of Nick Heidfeld and Neel Jani.
[3] In PC, Mike Guasch led the Drivers' Championship with 62 points, ahead of Colin Braun.
[3] With 59 points, Henrique Cisneros led the GTC Drivers' Championship, ahead of Jeroen Bleekemolen and Cooper MacNeil.