Bathurst 12 Hour

In 1990, Vincent Tesoriero, a race promoter and former Bathurst 1000 competitor, looked at the decline of Group A touring cars in Australia and saw an opportunity to run a 12-hour endurance race for Series Production cars at Mount Panorama. Tesoriero secured long time Bathurst 1000 sponsor James Hardie as a sponsor for the event in late 1990, leaving limited time to launch and organise the event for the Easter weekend in 1991.[2] The race regulations were based on the Group 3E Series Production Car rules then in use in the Australian Production Car Championship for naturally aspirated four- and six-cylinder passenger sedans, but also allowed turbocharged and V8-engined cars which had been outlawed from the Production Car Championship in 1990. Despite the short deadline, twenty-four cars were entered for the first race, spread over six different classes based on engine capacity and sporting specification.[3] Exotic mid-engined sports cars and GT cars were not eligible to enter.

The race was originally scheduled to run from 9am to 9pm but this was disallowed by Bathurst Regional Council. The race would instead run from 5:15am to 5:15pm, with the final two hours televised by Network Ten.[2] Despite the event's length, the competitors proved extremely reliable, with twenty cars finishing the race. The race was won by Allan Grice, Peter Fitzgerald and Nigel Arkell racing Fitzgerald's 1989 Production Car Championship specification Toyota Supra Turbo.[3]

In 1992, manufacturer-backed teams began to appear with large teams entered and funded by Mazda, Holden, Citroën and Peugeot. Porsche would also provide factory support from 1993 onwards. Honda, Nissan, Maserati, BMW and Lotus were also represented but not by factory-supported teams. The Mazda team would go on to dominate the event with the Mazda RX-7, winning the next three consecutive races at Mount Panorama.[2]

Facing rising costs, the 1995 event was moved from Bathurst to Eastern Creek Raceway in Sydney, and from the Easter weekend to August, before the race was discontinued in 1996.[2]

After no major race for production cars for a number of years, the concept was revived with the short-lived Bathurst 24 Hour races in 2002 and 2003. The races were run by Nations Cup owners PROCAR and were dominated by the Holden Monaro 427Cs of Garry Rogers Motorsport. The Bathurst 24 Hour only lasted two years before PROCAR owner Ross Palmer was forced to abandon the race due to rising costs.

The Bathurst 12 Hour was successfully revived in 2007 as part of the Bathurst Motorsport Festival[4] While James O'Brien, who masterminded the return of the event, planned for GT cars to share the event with production cars, the return of the race began with regulations close to its original concept as a race for production cars.[2][5] 32 cars were entered for the 2007 race,[6] which was won by Garry Holt, Paul Morris and Craig Baird in a BMW 335i.[7] The win was ten years after Morris and Baird had won the 1997 AMP Bathurst 1000 in a BMW only to later be disqualified for exceeding driver time regulations. The race proved a preview of this period of the race, which saw BMW and Mitsubishi as the main combatants. The 2007 Subaru entry of rally drivers Chris Atkinson, Dean Herridge and Cody Crocker would be the only other manufacturer to finish the race in the top two between 2007 and 2010.[2]

The 2008 and 2009 races were won by Mitsubishi Lancers, with Rod Salmon and Damien White amongst both line-ups. The 2009 race was particularly dominated by Mitsubishi, with the marque finishing in the first four positions.[2] Garry Holt would then repeat his 2007 victory in 2010, driving again with Morris and also with John Bowe. The race was interrupted for an hour after a tree fell across Conrod Straight.[8] The number of entries grew over this production-based period, peaking at 48 in 2009, while the final race held strictly to production car regulations in 2010 attracted 42 entries.[5] During this time, the event itself grew in stature each year, firmly entrenching itself as one of the biggest race meetings at the start of the domestic Australian racing season, along with the Adelaide 500 and the Australian Grand Prix.

In 2011, GT3-specification cars were allowed into the 12 hour race for the first time.[9] Despite this, the number of entries dropped dramatically as many of the production car teams, disillusioned by the move towards GT, decided not to race.[2] Of the 26 cars that competed in 2011, just eight raced in the production car classes, compared with the 42 that made up the full 2010 field.[5][10] The German-based Joest Racing dominated the 2011 event, with the team's two Audi R8 LMS GT3s finishing first and second, a lap ahead of the third-placed Porsche.[11] 2012 saw another small field of just 25 cars. Audi won the race for the second consecutive year, this time with DTM and FIA GT1 team Phoenix Racing.[12]

The 2013 event ended the two-year run of poor entry numbers, with a record field of over 50 cars.[13] Another first for the event saw the opening round of the 2013 Australian GT Championship incorporated into the first hour of the race. The results of the GT Championship round were based on the positions of the cars that had elected to race for GT Championship points at the end of the first hour of racing. Teams could then either continue on and complete the full race, or withdraw their car after the first hour. Drivers were allowed to cross-enter between cars so that they could race one car in the one-hour GT Championship race and then drive another car that was entered for the full 12 hours.[14] Erebus Motorsport took the first win for an Australian team under the GT regulations with German drivers Bernd Schneider, Thomas Jäger and Alexander Roloff taking their Mercedes-Benz SLS AMG to victory.[15]

Maranello Motorsport took a poignant win in the 2014 event—the team's former driver Allan Simonsen was killed in a crash at the 2013 24 Hours of Le Mans—with V8 Supercar driver Craig Lowndes holding off a late charge from German driver Maximilian Buhk to take victory.[16] 2014 also saw the introduction of the Allan Simonsen Pole Position Trophy, named in honour of Simonsen, to be awarded to the fastest car in qualifying.[17] The 2015 race featured a record twenty safety car periods, the last coming just minutes from the end of the race. Katsumasa Chiyo, driving a Nissan GT-R, took the lead with two laps remaining to give Nissan its first major victory at Mount Panorama since the 1992 Bathurst 1000.[18]

In August 2015, the V8 Supercars-owned company Supercars Events purchased 50% of the Bathurst 12 Hour, joining existing part-owners Bathurst Regional Council. This followed a date clash between the 2015 12 Hour and V8 Supercars' 2015 pre-season test day which saw V8 Supercar drivers, such as 2014 12 Hour-winner Lowndes, forced to take part in the test day and be unable to race in the 12 Hour.[19] With an increasing focus on the outright GT3 cars and a dwindling number of production cars in the race, the former organisers of the 12 Hour, Yeehah Events, announced the production car-based Bathurst 6 Hour for 2016, to restore a Bathurst endurance race for the production category. The 6 Hour is now part of the Bathurst Motor Festival at Easter.[20]

The 2016 race was the inaugural race of the newly formed Intercontinental GT Challenge, which in its first year also included the Sepang 12 Hours and Spa 24 Hours and is managed by the Stéphane Ratel Organisation.[21] The event itself saw record pace from Shane van Gisbergen in qualifying and the race to lead his Tekno Autosports McLaren 650S GT3 to victory alongside McLaren factory driver Álvaro Parente[22] and Tekno team owner/driver Jonathon Webb.[23] The 2017 event saw the introduction of an all-pro GT3 class for the first time, with the race receiving 55 entries, the highest in the event's revival.[24] In the race itself, Maranello Motorsport repeated their 2014 triumph, with Finnish driver Toni Vilander teaming up with Lowndes and Jamie Whincup to receive the Australian Tourist Trophy, which became the perpetual trophy for the outright winner.[25][26]

The 2018 race finished before the twelve hour duration due to a major crash at Sulman Park involving Ash Walsh, Bryce Fullwood and John Martin which saw Walsh and Martin transported to hospital.[27] This meant that the Audi Sport Team WRT entry of Robin Frijns, Stuart Leonard and Dries Vanthoor took the flag, despite doubts over whether they had the fuel to win the race if there was no disruption.[28] In 2019, the race had unprecedented amounts of green flag running leading to a distance record being set. After dropping from first to fourth in the final pit-stop phase, Matt Campbell completed three overtakes, including one on Chaz Mostert that required a post-race investigation, to take Porsche's first victory in the race alongside Dennis Olsen and Dirk Werner.[29]

The 2020 race again broke the distance record with Bentley taking their first victory in the event in six attempts.[30] The field was reduced by five cars prior to the race with several heavy crashes in practice and qualifying.[31] The race is on hiatus until 2022 due to international travel restrictions caused by the COVID-19 pandemic.[32]