Alsco Uniforms 300 (fall race)

The Alsco Uniforms 300 is a NASCAR Xfinity Series stock car race held at Las Vegas Motor Speedway in Las Vegas, Nevada. The inaugural race was held in 2018 and is the first race of the Xfinity Series' playoffs. As a playoff race, NASCAR Cup Series drivers are prohibited from competing.

The race was initially the final race of the regular season, with the top 12 drivers in points standings at the end of the event advancing to the seven-race playoffs. In 2020, the race was moved to September and held as the second race of the opening round of the playoffs.

History
On March 8, 2017 it was announced that Las Vegas Motor Speedway, another SMI track, would get a second Cup date, a second Xfinity date, and a second Truck date. While the Fall Cup race and Truck race at New Hampshire Motor Speedway will go there, Kentucky will lose this race and be moved to Las Vegas. The new date that Las Vegas Motor Speedway acquired from Kentucky Speedway became the final race of the regular season to replace the Overton's 300 at Chicagoland Speedway which moved to June.

In 2019, with the announcement of the track's September weekend going prime-time, the race became a Saturday night event. Originally known as the DC Solar 300, the race became the Rhino Pro Truck Outfitters 300 for 2019.

The race name was changed to the Alsco 300 in 2020 after Alsco took over naming rights, and was tweaked to become the Alsco Uniforms 302 in 2021. Just like the Cup race at New Hampshire Motor Speedway (another SMI track), the race will add an extra lap in the process to make the race close to 302 miles with the event being 301.5 miles/201 laps in length.