The NASCAR Camping World Truck Series (formerly the NASCAR Super Truck Series presented by Craftsman and the NASCAR Craftsman Truck Series) is a pickup truck racing series owned and operated by the National Association for Stock Car Auto Racing. It is the only series in all of NASCAR to race modified production pickup trucks and is one of the three national divisions of NASCAR, together with the Nationwide Series and the top level Sprint Cup.

The idea for the Truck Series dates back to 1993. A group of SCORE off-road racers (Dick Landfield, Jimmy Smith, Jim Venable, and Frank "Scoop" Vessels) wanted a bigger audience for truck racing. They made a prototype for a NASCAR-style pickup truck. These were first shown off during the 1994 Daytona 500, and four demonstration races were held during the season.

The first event at Mesa Marin Raceway had six trucks. The other three events were held at Portland Speedway, Saugus Speedway, and Tucson Raceway Park. Tucson Raceway Park held four events that winter, which were nationally televised during the Winter Heat Series coverage. These trucks proved to be extremely popular, and it led to NASCAR creating the series, originally known as the "Super Truck Series", in 1995.

A more popular rule that was effective until the middle of the 2004 season was the "overtime" rule. Unless interrupted by weather, Craftsman Truck Series races had to end under green flag conditions, and the rule mandated that all races must end with a minimum of two consecutive laps in green flag condition, often referred to as a "green-white-checkered" finish. Since racing to the yellow flag was prohibited until 1998 (and again in 2003 under the current free pass rule), scoring reverted to the last completed lap, and until racing back to the line was legalized in 1998, if the yellow waved during the first lap of a green-white-checkered finish, the entire situation would be reset.

This rule meant some races would be greatly extended. In 1998, a CBS-televised race in Fountain, CO scheduled for 186 laps ran 198 laps (12 extra laps) because of multiple attempts, and the last such race, in Madison, IL, in 2004, lasted 14 additional laps (16.25 miles).
A July 24, 2004 rule change for NASCAR's three national series meant only one "green-white-checkered" finish can be attempted, and the race can end under yellow in one of four situations -- inclement weather, darkness, the yellow flag waving because of an incident during the final lap of a race, or the yellow flag waving after the one attempt at "green-white-checkered" begins.
Ironically, the first Truck Series race under the new rules ended with a yellow flag on the final lap.

Most of the first drivers in the series were veteran short track drivers who hadn't made it into the other NASCAR national series. It is worth noting that most of the early champions have become Sprint Cup Series regulars later in their careers. As the years went on, a number of younger drivers debuted in the series, using the series as a springboard for their racing careers. Current NASCAR stars Scott Riggs, Greg Biffle, Kevin Harvick, Jamie McMurray, Kurt Busch, Carl Edwards, and Kyle Busch each started in the series.

Kyle Busch was 16 when thrown out of a 2001 Craftsman Truck Series race in Fontana, CA by CART (which sanctioned the Marlboro 500 that weekend) because tobacco sponsorship regulations prohibited competitors under 18 in any race during the meet, and resulted in a 2002 NASCAR minimum age requirement of 18.

Most races today will last around 250 miles at larger tracks, 150 to 200 miles at most others, and 200-250 laps around the shortest tracks.