Unlike fixed-distance races, Le Mans is won by the car that covers the greatest distance in 24 hours. The race was conceived as a test of automotive reliability and efficiency rather than pure speed — a contrast to the Grand Prix racing that dominated European motorsport at the time of its creation. Teams must balance pace with the demands of running a car for a full day and night without mechanical failure, managing fuel, tyres, and braking materials while minimising time spent in the pits.
Current regulations require three drivers to share each car. Individuals are limited to no more than four hours of continuous driving in any six-hour window and no more than 14 hours of total driving across the race. The race begins in mid-afternoon on Saturday and finishes at the same hour the following day, meaning competitors face both the challenges of daytime heat and a night portion under artificial lighting. Cars on the modern circuit regularly reach 366 km/h (227 mph); before the addition of chicanes to the Mulsanne Straight in 1990, speeds of 407 km/h (253 mph) were recorded in 1988.
The Circuit de la Sarthe measures 13.626 km (8.467 mi) in its current configuration. It consists partly of a permanent racing facility and partly of closed public roads, which are reassembled and dismantled around each event. The most distinctive section is the Ligne droite des Hunaudières — commonly called the Mulsanne Straight — which leads toward the village of Mulsanne and once offered a near-continuous run of around 6 km (3.7 mi). In 1990, the FIA required all sanctioned circuits to break any straight longer than 2 km (1.2 mi), resulting in the addition of two chicanes to the Mulsanne that reduced the maximum recorded speed. The circuit has been modified repeatedly since 1923, primarily for safety reasons.
Competing cars race simultaneously in distinct classes. As of 2021 the structure consists of three categories: the Hypercar class (comprising Le Mans Hypercars and, from 2023, LMDh vehicles), the LMP2 class using standardised chassis from approved constructors mated to a common Gibson V8 engine, and the LMGT3 class for production-based sports cars. The Hypercar class replaced the former LMP1 category and was designed to encourage a wider variety of technical approaches while controlling costs. A special entry category called Garage 56 exists for experimental vehicles testing new automotive technologies; introduced in 2012, it carries no competitive standing but allows manufacturers to demonstrate innovations in a race environment.
To be classified as a finisher, a car must complete the final lap of the race and have covered at least 70 percent of the distance achieved by the overall winner.
The first race ran on public roads around Le Mans on 26–27 May 1923, originally conceived as a three-year Rudge-Whitworth Triennial Cup competition before evolving into an annual event. Early races were dominated by French, British, and Italian manufacturers, with Bugatti, Bentley, and Alfa Romeo among the prominent marques. The race was cancelled in 1936 due to a general strike and was suspended from 1940 to 1948 because of World War II.
The race resumed in 1949 with renewed manufacturer interest. Ferrari took its first victory that year. After the formation of the World Sportscar Championship in 1953 — of which Le Mans was a founding round — major manufacturers including Jaguar, Mercedes-Benz, and Aston Martin entered factory efforts. The 1955 race was marked by catastrophe: Pierre Levegh's Mercedes crashed into spectators near the pit straight, killing more than 80 people in the worst accident in motorsport history. The disaster prompted widespread safety improvements, and the entire pit complex was subsequently rebuilt further from the track.
Ford entered the race in the 1960s with the GT40, ending Ferrari's dominance and winning four consecutive years from 1966 to 1969. The 1966 result was itself marked by controversy: Ken Miles and co-driver Denny Hulme were leading when team orders slowed the Fords for a simultaneous photo finish, only for the victory to be awarded to the car of Bruce McLaren and Chris Amon on the grounds that it had started farther back on the grid and thus covered a marginally greater distance.
Porsche dominated through much of the 1970s and 1980s with the 917, 935, and 936 models, then the Group C-era 956 and 962. The 962 was produced in sufficient numbers for privateers to buy and race their own examples, contributing to Porsche winning six consecutive years. Jaguar won in 1988 and 1990, and Mazda became the first Japanese marque to win overall in 1991 with the rotary-powered 787B. Peugeot won in 1992 and 1993.
A pivotal circuit change came in 1990, when two chicanes were inserted into the Mulsanne Straight to reduce the extreme speeds that had led to several serious accidents. The modification followed the recording of 407 km/h (253 mph) in 1988 by a WM Peugeot driven by Roger Dorchy.
Following the end of the World Sportscar Championship, Le Mans saw a resurgence of GT machinery. BMW won in 1999, their sole overall victory to date. That same year, Mercedes-Benz withdrew from the event after three separate airborne accidents involving their CLR model, caused by aerodynamic instability, prompted the company to end its entire sportscar programme.
Audi became the dominant force of the early 2000s, winning repeatedly with the R8 and later the R10 TDI — the first diesel-powered winner, in 2006. The introduction of diesel technology at Le Mans prompted Peugeot to follow with its own oil-burning prototype, and the competition between the two manufacturers defined the second half of the decade. Audi won 13 times in 15 years of participation, working alongside Bentley (a corporate partner) to win in 2003.
Toyota took their first overall win in 2018 with Fernando Alonso, Sebastien Buemi, and Kazuki Nakajima, going on to win again in 2019, 2020, 2021, and 2022. The Hypercar class was introduced in 2021, replacing LMP1 and bringing a wave of new manufacturer entries. The 2020 race was held behind closed doors due to the COVID-19 pandemic. The race has been part of the FIA World Endurance Championship since 2012.
Porsche holds the record for overall victories with 19, including seven consecutive wins from 1981 to 1987. Audi follows with 13, and Ferrari with 11. Tom Kristensen of Denmark holds the individual record with nine victories between 1997 and 2013, including six in a row. Jacky Ickx won six times between 1969 and 1982. Graham Hill is the only driver to have won the informal Triple Crown of Motorsport — Le Mans (1972), the Monaco Grand Prix, and the Indianapolis 500. Henri Pescarolo holds the record for most appearances at the race, with 33 starts.
The race has maintained several long-standing traditions. For decades it began with the Le Mans start, in which drivers ran across the track to reach their cars; this was phased out by 1971 due to safety concerns when drivers were found to be skipping safety harnesses in the rush. The race now begins with a rolling start behind a safety car. The waving of the French tricolor starts the race; a fly-over with aircraft trailing blue, white, and red smoke has accompanied the start in more recent years. The champagne spray on the podium, now universal in motorsport, originated at Le Mans in 1967 when Dan Gurney spontaneously sprayed spectators on the victory podium after winning with co-driver A. J. Foyt.