The 2026 United Rentals 300 was a NASCAR O'Reilly Auto Parts Series race held on Saturday, February 14, 2026, at Daytona International Speedway in Daytona Beach, Florida. Contested over 120 laps on the 2.5-mile (4.0 km) superspeedway, it was the first race of the 2026 NASCAR O'Reilly Auto Parts Series season, and the 45th running of the event.
Austin Hill, driving for Richard Childress Racing, would survive a wreck-filled race and continued his superspeedway prowess, winning both stages and led a race-high 78 laps from the pole position to earn his 15th career NASCAR O'Reilly Auto Parts Series win, his first of the season, and his 11th superspeedway win in the series. It was also his fourth win in the season-opening race in the last five years. Justin Allgaier finished second, and Ryan Sieg finished third. Jordan Anderson and Sammy Smith rounded out the top five, while Ryan Ellis, Carson Kvapil, Blaine Perkins, Jesse Love, and Rajah Caruth rounded out the top ten.
Daytona International Speedway is one of three superspeedways to hold NASCAR races, the other two being Atlanta Motor Speedway and Talladega Superspeedway. The standard track at Daytona International Speedway is a four-turn superspeedway that is long. The track's turns are banked at 31 degrees, while the front stretch, the location of the finish line, is banked at 18 degrees.
The first and only practice session was held on Friday, February 13, at 4:30 PM EST, and would last for 50 minutes.
Jeb Burton, driving for Jordan Anderson Racing, would set the fastest time in the session, with a lap of 48.735, and a speed of .
Qualifying was held on Saturday, February 14, at 10:00 AM EST. Since Daytona International Speedway is a superspeedway, the qualifying procedure used is a single-car, single-lap system with two rounds. In the first round, drivers have one lap to set a time and determine positions 11-38. The fastest ten drivers from the first round will advance to the second round, and whoever sets the fastest time in Round 2 will win the pole and determine the rest of the starting lineup.
Austin Hill, driving for Richard Childress Racing, would score the pole after advancing from the preliminary round and setting the fastest time in Round 2, with a lap of 49.390, and a speed of .
Three drivers would fail to qualify: Garrett Smithley, David Starr, and Joey Gase. Anthony Alfredo, who originally failed to qualify in his No. 96 car, would make a deal with Alpha Prime Racing to run their No. 4 car in the race, replacing Caesar Bacarella.
Stage One Laps: 30
Stage Two Laps: 30
Stage Three Laps: 60