The Lone Star Le Mans (previously known as 6 Hours of the Circuit of the Americas) is an endurance race for Le Mans Prototypes and grand tourer-style cars held at the Circuit of the Americas in Austin, Texas. Its first running was on 22 September 2013 as the fifth round of the 2013 FIA World Endurance Championship season. On 2 December 2019, the Austin round was revived for 2020, as a result of a conflict between the promoters at the Autodromo Jose Carlos Pace and the WEC, where the Austin round replaced the 6 Hours of São Paulo.