Drag racing: two cars, one straight line, and a clock on each lane.

What drag racing is

Britannica describes drag racing as a contest that began in the United States, in which two cars start side by side from a standstill on a straight strip, most often a quarter mile (0.4 km) long. Results are measured by elapsed time and final speed. The NHRA (National Hot Rod Association) calls it a timed acceleration contest from a standing start, run as a tournament-style elimination in which the loser of each race is out.

Britannica's history traces the sport to the 1930s, on quarter-mile strips in the Southern California desert, and says it spread quickly after World War II and was recognised by the FIA in 1965. The NHRA says Wally Parks, then editor of Hot Rod magazine, founded it in 1951, and that its first official race was held in April 1953 at the Los Angeles County Fairgrounds in Pomona. Wikipedia (secondary) says one of its aims was to separate organized hot rodding from reckless street racing.

The start: the Christmas Tree

Races are started by a set of lights known as the Christmas Tree. NHRA describes each side as having:

• Small pre-stage and stage lights. Pre-stage comes on when the car is about 7 inches behind the start line; stage means the front tyres are on the line.
• Three large amber lights, a green and a red.

There are two ways to run the Tree. On a Pro Tree, NHRA says, all three ambers flash together and the green follows 0.4 seconds later. On a Sportsman (full) Tree the ambers light one after another, 0.5 seconds apart.

Timing and winning

Each lane is timed separately. NHRA explains that elapsed time (ET) runs from when the car leaves the staging beams to when it crosses the finish line, and that speed is measured in a 66-foot trap at the finish. Sonoma Raceway's NHRA brochure lists what a timeslip shows: 60-foot, 330-foot, eighth-mile, 1,000-foot and quarter-mile times, speeds, and reaction time, which is how quickly the driver responded to the green.

NHRA says the first car across the finish line wins, unless it ran quicker than its dial-in or class index in categories that use them. A racer can also be disqualified for leaving early, crossing out of the lane, failing to stage or failing inspection after the run.

Bracket racing

Bracket racing is a handicap system that lets cars of different performance race each other. Sonoma Raceway's NHRA brochure describes it this way:

• Each driver predicts the elapsed time their car will run. That prediction is the dial-in.
• The car with the slower dial-in gets a head start equal to the difference between the two.
• Top speed does not matter. Running quicker than your dial-in is a breakout; if both cars break out, the one closer to its dial-in wins.
• Leaving before the green, called redlighting, is a disqualification.

The same brochure says bracket races are usually run over a quarter mile or an eighth mile.

The professional classes

Wikipedia (secondary) says the NHRA's top tier, the NHRA Mission Foods Drag Racing Series, has four professional classes; NHRA's 2025 championship coverage names them as Top Fuel, Funny Car, Pro Stock and Pro Stock Motorcycle. Wikipedia adds that the nitromethane-fuelled classes, Top Fuel dragsters and Funny Cars, race 1,000 feet rather than the full quarter mile. Wikipedia's general motor racing article says top fuel dragsters can finish in about 4.5 seconds or less at up to 530 km/h (329 mph).

The season ends with a six-race playoff, the Countdown to the Championship, which NHRA confirms. NHRA reports that its 2025 champions were Doug Kalitta (Top Fuel), Austin Prock (Funny Car), Dallas Glenn (Pro Stock) and Richard Gadson (Pro Stock Motorcycle); the 2025 finals at Pomona were cancelled because of weather, so three of those titles were settled on the points standing at the time. The 2026 Countdown was still in progress as of October 2026, with Pomona the final stop. Wikipedia credits John Force with 16 Funny Car championships in a driving career that ran from 1978 to 2024. Results are on our drag racing series page.

How people get into it

Drag racing is not only professional. Wikipedia (secondary) says the NHRA has more than 100 member tracks and that most of its participants are dues-paying Sportsman racers, in programs including the Lucas Oil Drag Racing Series and the NHRA Jr. Drag Racing League.

For a first visit, Sonoma Raceway's brochure points to test-and-tune sessions, which it says most tracks hold weekly, where newcomers can make passes without competing. After that comes bracket racing, where, as the brochure explains, top speed does not decide the result.

Safety equipment rules for drag racing were not covered by the research behind this page, so check the tech rules of the track and class you enter. On helmets, Dragzine says motorcycle (M) helmets are not designed for impacts with roll cages or made from fire-retardant materials, and recommends SA-rated helmets for car competition. See our helmets page for how the ratings differ, and getting started for where drag racing fits among the other ways in.