The 2021 Bass Pro Shops NRA Night Race was a NASCAR Cup Series race held on September 18, 2021 at Bristol Motor Speedway in Bristol, Tennessee. Contested over 500 laps on the .533-mile (0.858 km) short track, it was the 29th race of the 2021 NASCAR Cup Series season, third race of the Playoffs and final race of the Round of 16.

The race was won by Kyle Larson. Tyler Reddick, Aric Almirola, Kurt Busch and Michael McDowell were eliminated from the round of 16.

Martin Truex Jr. was awarded the pole for the race as determined by competition-based formula.^[4]

Martin Truex Jr. earned the pole position for the start of the race, where he led the first five laps. Denny Hamlin won stage one after passing Kyle Larson on lap 90. A red flag occurred for nearly eight minutes following a turn 4 incident that involved four vehicles on lap 221. Larson led at the end of stage two. On lap 464, Chase Elliott was forced to pit from the lead when he had a flat tire from damage he received when Kevin Harvick got into his rear quarter panel. When back on the track, Elliott attempted to retaliate by getting into the side of then race leader Harvick and then running Harvick's preferred line, thus slowing him down. Larson was able to pass Harvick on lap 497, and secure his 12th overall Cup Series win. Following the race, Harvick and Elliott bumped cars on pit road and confronted each other when they eventually parked. Harvick said, "I just told him it was kind of a chicken shit move that he did there at the end you know. We're racing for the freaking win at Bristol. We're three-wide in the middle and he throws a temper tantrum like I was just trying to get the lead and racing hard, then he pulls up infront of me, and just sits there until I lose the whole lead." He ended by saying "God Damn. I'm about to rip somebody's freaking head off." Elliott said, "It's something [Harvick] does all the time. He runs into your left side constantly at other tracks and sometimes it does cut down your left side (tires), other times it doesn't." The argument continued for several minutes continuing inside Elliott's hauler. Michael McDowell, Kurt Busch, Tyler Reddick, and Aric Almirola were eliminated from the Playoffs.