Race 5 - Infineon Long - Thursday 17th July @ 20:00 BST

Sonoma Raceway, formerly Sears Point Raceway and Infineon Raceway is a 2.52-mile (4.06 km) road course and drag strip located on the landform known as Sears Point in the southern Sonoma Mountains in Sonoma, California, USA. The road course features 12 turns on a hilly course with 160 feet of total elevation change. It is host to one of only two NASCAR Sprint Cup Series races each year that are run on road courses (including Watkins Glen International in Watkins Glen, New York), and one of six national series road course races (Nationwide Series racing at Watkins Glen, Mid-Ohio Sports Car Course in Lexington, Ohio and Road America in Elkhart Lake, Wisconsin; and the Camping World Truck Series at Canadian Tire Motorsport Park in Bowmanville, Ontario). It is also host to the IZOD IndyCar Series and several other auto races and motorcycle races such as the American Federation of Motorcyclists series. Sonoma Raceway continues to host amateur, or club racing events which may or may not be open to the general public. The largest such car club is the Sports Car Club of America.

With the closure of Riverside International Raceway in Riverside, California after the 1988 season, NASCAR, wanting a west coast road course event to replace it, chose the Sears Point facility. Riverside International was razed for a shopping center development.

In 2002, Sears Point Raceway was renamed after a corporate sponsor, Infineon. However, as with many renamings of sports complexes, many people still call it by its original name. (It was never affiliated with Sears, Roebuck and Company, having been named for the nearby Sears Point Ranch founded in the 1850s by settler Franklin Sears.) On March 7, 2012, it was announced that Infineon would not renew their contract for naming rights when the deal expired in May, and the track management is looking for a new company to take over naming rights. Until it can find a new corporate sponsor, the course is simply identifying itself as "Sonoma."

The standard, full length road course at Sonoma Raceway is a 2.52 miles (4.06 km) 12-turn course. This course was utilized by all competition through 1997. Most races, including the Grand Prix of Sonoma, use the full course. The course is noted for turns two and three, which are negative-camber or "off-camber" turns, with the inside of the turn higher than the outside. This provides a challenge for the driver, as turn two would normally have the drivers moving to the left side of the track.

The raceway also has a quarter mile (400 m) dragstrip used for NHRA drag racing events. The drag strip was originally located on part of the front straightaway of the course. Track changes completed in 2002 separated the road course from the drag strip.

The Sonoma Historic Motorsports Festival, an annual classic car racing event, uses the full circuit.