The 2017 Apache Warrior 400 presented by Lucas Oil was a Monster Energy NASCAR Cup Series race that was held on October 1, 2017, at Dover International Speedway in Dover, Delaware. Contested over 400 laps on the one-mile (1.6 km) concrete speedway, it was the 29th race of the 2017 Monster Energy NASCAR Cup Series season, third race of the Playoffs and final race of the Round of 16.