The 2006 Lenox Industrial Tools 300 was a NASCAR Nextel Cup Series race held on July 16, 2006 at New Hampshire International Speedway, in Loudon, New Hampshire.

Contested over 308 laps – extended from 300 laps due to a green-white-checker finish – on the 1.058-mile (1.703 km) speedway, it was the 19th race of the 2006 NASCAR Nextel Cup Series season.

New Hampshire International Speedway is a 1.058-mile (1.703 km) oval speedway located in Loudon, New Hampshire which has hosted NASCAR racing annually since the early 1990s, as well as an IndyCar weekend and the oldest motorcycle race in North America, the Loudon Classic.

Nicknamed "The Magic Mile", the speedway is often converted into a 1.6-mile (2.6 km) road course, which includes much of the oval.

The track was originally the site of Bryar Motorsports Park before being purchased and redeveloped by Bob Bahre.