1976 California 500

Ontario Motor Speedway was built using public bonds and the bond-owners were represented by the non-profit Ontario Motor Speedway Corporation. Beginning in 1973, a group led by Parnelli Jones and Tony Hulman leased Ontario Motor Speedway and promoted racing events there. 15 days after the 1975 California 500, Jones announced that the group would terminate their lease with the non-profit group. Jones said, "We have lost a lot of money and the future doesn't look any better. There is too much politics involved in the speedway. We have to answer to the non-profit board that oversees the track, to the bank that represents the bond holders, and to the City Council, which can tell us what we can and can't promote."[1]

Moving forward, OMS Corp. eliminated the business of leasing to promoter groups and rehired Ray Smartis as General Manager on their behalf, who had worked with the track under past groups. Under his leadership, Smartis realized the track was unsustainable by using it only as a venue for large events and aimed to have the track pay their bills through small events such as swap meets, film production rentals, and concerts. The large events would help the track be profitable.[2]

Smartis also moved the California 500 back to its original Labor Day weekend. "Running the California 500 in March proved to be a financial disaster," Smartis said in August 1975.[3] "Considerable research had gone into the Labor Day scheduling back in 1968 when the speedway was built and that was the best possible time."[4]

Indy cars were scheduled to return to Ontario in March with a 200-mile doubleheader paired with a USAC Stock Car race. In January 1976, the March doubleheader was canceled by the track due to a lack of sponsorship.

The move to Labor Day, once again made the California 500 the final leg in IndyCar's Triple Crown. In May, Johnny Rutherford won the Indianapolis 500. In the second Crown Jewel race, Al Unser won the Pocono 500.

Janet Guthrie entered the California 500 and attempted to become the first woman to compete in the California 500. Earlier that year, Guthrie attempted to qualify for the Indianapolis 500 and was the first woman to compete in a 500-mile Indy Car when she competed in the Pocono 500. In addition, Rick Mears and Danny Ongais made their Indy car debut at the California 500. Mears was driving a car owned by Bill Simpson while Ongais drove for Vel's Parnelli Jones Racing.[5]

Unlike in past years, practice and Time Trials were reduced to one week instead of two, with practice beginning on Sunday August 29. On the first day of practice, Bobby Unser posted the fastest speed at 185.594 mph.[6] In Monday's practice, Johnny Rutherford was fastest with a speed of 187.153 mph. Al Loquasto crashed in turn one. Later, Al Unser spun and hit the turn one wall, impacting the concrete with the rear of the car and climbing several feet off the ground. Both crashes were blamed on high winds.[7]

Rutherford posted the fastest speed on Tuesday at 188.957 mph. A. J. Foyt arrived at the track on Tuesday after spending time with his mother in Houston who suffered a stroke on Sunday. Foyt ran only two laps before a leaky radiator forced him back to the garage.[8]

A reported crowd of 52,466 spectators attended the California 500.[11][12]

From his position on the pole, A.J. Foyt led the first 14 laps. Roger Rager brought out a caution flag when he spun on lap 14 and Foyt chose to pit under caution. On the restart, Eldon Rasmussen blew an engine and brought out the second caution to clean oil. On lap after the restart, Dick Simon stalled on track and returned the caution flag.

In an impressive Indycar debut, Danny Ongais climbed from 11th starting spot to fifth by lap 50. Exiting turn two on lap 54, Ongais suffered a broken halfshaft which sent his car into the outside wall along the backstretch. The car climbed the wall and flipped, landing upside down and sliding along the backstretch. Pancho Carter spun to avoid Ongais and impacted the outside wall. Salt Walther came upon the wreck, stopped his car, and ran over to help Ongais. Carter and Walther flipped the car over to allow Ongais to walk away from the wreck. Ongais's helmet had swirl marks on it from where it dragged along the asphalt. He was checked and released at the infield hospital where he complained of a sore head and bruised feet.[11][13]

On the restart of Ongais's crash, John Mahler crashed in turn one. After six laps of green flag racing, Bill Vukovich Jr. crashed in turn one on lap 77. A.J. Foyt retired from the race on lap 77 when he lost oil pressure.

On lap 101, Gordon Johncock, Wally Dallenbach, and Johnny Rutherford entered the pits under green. Watching the two cars in front of him, Rutherford missed his pit box and had to go around the track another lap.[13]

The race turned into a four car battle between Bobby Unser, Gordon Johncock, Wally Dallenbach, and Johnny Rutherford. After the last cycle of pit stops, Unser took the lead with 23 laps remaining.

The caution was thrown on with only seven laps remaining when beer cans were thrown on the track.[13] This set up a four lap run to the finish with Unser followed by Rutherford and Johncock.

Unser won by 2.54 seconds and became the first man to win the California 500 twice, having previously won the 1974 California 500. By finishing second, Rutherford won the Olsonite Triple Crown championship for 500-mile races and the $1,500 prize it carried.