The ARCA Menards Series West, formerly the NASCAR K&N Pro Series West, NASCAR AutoZone West Series, NASCAR Winston West Series and NASCAR Camping World West Series, is a regional stock car racing series owned and operated by the Automobile Racing Club of America (ARCA) and the National Association for Stock Car Auto Racing (NASCAR). The series was first formed in 1954 as a proving ground for drivers from the western United States who could not travel to race in the more traditional stock car racing regions like North Carolina and the rest of the southern United States.

Mobility Resort Motegi (モビリティリゾートもてぎ) is a motorsport venue located in Motegi, Tochigi Prefecture, Japan. Originally Twin Ring Motegi (ツインリンクもてぎ), the venue's name came from the facility having two race tracks: a 2.493 km (1.549 mi) oval track and a 4.801 km (2.983 mi) road course. It was built in 1997 by Honda Motor Co., Ltd., as part of the company's effort to bring the Championship Auto Racing Teams series to Japan, helping to increase their knowledge of American open-wheel racing. The oval was last raced on in 2010 by the Indycar Series. On 1 March 2022, the name of the track was changed to Mobility Resort Motegi, coinciding with the 25th anniversary of the facility. The road course's most notable event is the Japanese motorcycle Grand Prix.