The 2015 Kobalt 400 was a NASCAR Sprint Cup Series race held on March 8, 2015, at Las Vegas Motor Speedway in Las Vegas. Contested over 267 laps on the 1.5 mi (2.4 km) asphalt tri-oval, it was the third race of the 2015 NASCAR Sprint Cup Series season. Kevin Harvick won the race, his first of the season, while Martin Truex Jr. finished second. Ryan Newman, Dale Earnhardt Jr. and Denny Hamlin rounded out the top five.