2018 DC Solar 300

[1] To fill out the podium, Justin Allgaier of JR Motorsports and Cole Custer of Stewart-Haas Racing with Biagi-DenBeste would finish second and third, respectively.

The complex is owned by Speedway Motorsports, Inc., which is headquartered in Charlotte, North Carolina.

[2] Matt Tifft of Richard Childress Racing would set the fastest time in the session, with a lap of 30.403 and an average speed of 177.614 miles per hour (285.842 km/h).

[3] The second and final practice session, sometimes referred to as Happy Hour, would occur on Friday, September 14, at 2:05 PM PST, and would last for 45 minutes.

[2] Tyler Reddick of JR Motorsports would set the fastest time in the session, with a lap of 30.561 and an average speed of 176.696 miles per hour (284.365 km/h).