The 2017 ISM Connect 300 was a Monster Energy NASCAR Cup Series race held on September 24, 2017, at New Hampshire Motor Speedway in Loudon, New Hampshire. Contested over 300 laps on the 1.058-mile (1.703 km) speedway, it was the 28th race of the 2017 Monster Energy NASCAR Cup Series season, second race of the Playoffs and second race of the Round of 16. On March 8, 2017 it was announced that the fall NHMS date would move to Las Vegas Motor Speedway starting in 2018.