The season began March 19, 2011 with the 12 Hours of Sebring and ended after nine rounds on October 1 with the Petit Le Mans.
While Lola-built sports cars dominated the upper racing positions in the faster LMP classes for sports prototype vehicles, their numbers continued to drop to the point where at the third round of the series at 2011 Northeast Grand Prix no LMP2 class cars were entered.
The Lola-Mazda of the Dyson Racing Team and its drivers Chris Dyson and Guy Smith won the LMP1 class championship at the penultimate race at Mazda Raceway Laguna Seca, holding a 32-point gap over the Muscle Milk Motorsports team and driver Klaus Graf.
LMPC title remained live until the final race of the season where Genoa Racing's Eric Lux and the Core Autosport pair of Gunnar Jeannette and Ricardo González ended tied on points, and had the same number of second, third, fourth and fifth-place finishes.
In the Grand Touring classes, Rahal Letterman Lanigan Racing's BMW M3 GT2 driven by Dirk Müller and Joey Hand won the championship, taking three wins and three podiums.
They wrapped up the class title a round early, having held a 33-point lead over the Chevrolet pair of Oliver Gavin and Jan Magnussen.
Two unnamed events were added to the calendar, while the series race at Miller Motorsports Park in Utah was not retained.