The 2021 South Point 400 was a NASCAR Cup Series race held on September 26, 2021, at Las Vegas Motor Speedway in Las Vegas. Contested over 267 laps on the asphalt intermediate speedway, it was the 30th race of the 2021 NASCAR Cup Series season, the fourth race of the Playoffs, and the first race of the Round of 12.
Las Vegas Motor Speedway, located in Clark County, Nevada outside the Las Vegas city limits and about 15 miles northeast of the Las Vegas Strip, is a complex of multiple tracks for motorsports racing. The complex is owned by Speedway Motorsports, Inc., which is headquartered in Charlotte, North Carolina.
Kyle Larson was awarded the pole for the race as determined by competition-based formula.
Stage One Laps: 80
Stage Two Laps: 80
Stage Three Laps: 107
NBC Sports covered the race on the television side. Rick Allen, Jeff Burton, Steve Letarte and Dale Earnhardt Jr. called the race from the broadcast booth. Dave Burns and Kelli Stavast handled the pit road duties from pit lane.
PRN had the radio call for the race, which was also simulcast on Sirius XM NASCAR Radio. Doug Rice and Mark Garrow called the race from the booth when the field raced through the tri-oval. Rob Albright called the race from a billboard in turn 2 when the field raced through turns 1 and 2 & Pat Patterson called the race from a billboard outside of turn 3 when the field raced through turns 3 and 4. Brad Gillie, Brett McMillan and Wendy Venturini handled the duties on pit lane.