The 2018 U.S. Cellular 250 presented by The Rasmussen Group was the 19th stock car race of the 2018 NASCAR Xfinity Series season, and the 10th iteration of the event.

It has over 25,000 permanent seats as well as a unique multi-tiered Recreational Vehicle viewing area along the backstretch.

[2] Elliott Sadler of JR Motorsports would set the fastest time in the session, with a lap of 24.046 and an average speed of 130.999 miles per hour (210.822 km/h).

[3] The second and final practice session, sometimes referred to as Happy Hour, was held on Friday, July 27, at 6:05 PM CST, and would last for 50 minutes.

[2] Casey Roderick of GMS Racing would set the fastest time in the session, with a lap of 23.933 and an average speed of 131.617 miles per hour (211.817 km/h).