The 2023 Clean Harbors 175 was the 18th stock car race of the 2023 NASCAR Craftsman Truck Series, the second race of the Round of 10, and the first iteration of the event. The race was held on Sunday, August 27, 2023, in West Allis, Wisconsin at the Milwaukee Mile, a 1 mile (1.6 km) permanent oval shaped racetrack. The race took the scheduled 175 laps to complete. Grant Enfinger, driving for GMS Racing, would hold off Carson Hocevar with under 10 laps to go, and earned his 10th career NASCAR Craftsman Truck Series win, and his second of the season. Enfinger would dominate the majority of the race, winning both stages and leading a race-high 95 laps. He would also earn a spot in the next spot of the playoffs.^[1] To fill out the podium, Hocevar, driving for Niece Motorsports, and Christian Eckes, driving for McAnally-Hilgemann Racing, would finish 2nd and 3rd, respectively. This was the first Truck Series to be held at Milwaukee Mile since 2009.

The Milwaukee Mile is a 1.015 mi (1.633 km) oval race track in the central United States, located on the grounds of the Wisconsin State Fair Park in West Allis, Wisconsin, a suburb west of Milwaukee. Its grandstand and bleachers seats approximately 37,000 spectators. Paved 70 years ago in 1954, it was originally a dirt track. In addition to the oval, there is a 1.800 mi (2.897 km) road circuit located on the infield.

As the oldest operating motor speedway in the world, the Milwaukee Mile has hosted at least one auto race every year from 1903 to 2015 (except during U.S. involvement in World War II). The track has held events sanctioned by major bodies, such as the AAA, USAC, NASCAR, CART/Champ Car World Series, and the IndyCar Series. There have also been many races in regional series such as ARTGO.

The first and only practice session was held on Saturday, August 26, at 1:00 PM CST, and would last for 50 minutes.^[2] Ty Majeski, driving for ThorSport Racing, would set the fastest time in the session, with a lap of 30.351, and an average speed of 120.391 mph (193.751 km/h).^[3]

Qualifying was held on Sunday, August 27, at 10:30 AM CST.^[2] Since Milwaukee Mile is a mile oval, the qualifying system used is a single-car, one-lap system with only one round. In that round, whoever sets the fastest time will win the pole.^[4] Grant Enfinger, driving for GMS Racing, would score the pole for the race, with a lap of 29.744, and an average speed of 122.848 mph (197.705 km/h).^[5]

Stage 1 Laps: 55

Stage 2 Laps: 55

Stage 3 Laps: 75