The 18th Annual petit Le Mans presented by Mazda was the 2015 version of the Petit Le Mans automotive endurance race, was held on October 1–3 2015 at the Road Atlanta circuit in Braselton, Georgia. This was the second Petit Le Mans in the United SportsCar Championship. The race was won overall by Richard Lietz, Patrick Pilet, and Nick Tandy in the #911 Porsche North America Porsche 911 RSR. Originally scheduled to run for 10 hours, the race was concluded after 8 hours (199 laps) were completed due to heavy rain, darkness, visibility, and hydroplaning.[1] This marked the first time in the event's history that a GT car won overall.[2][3]