Robles were constructed from grandstands removed from the speedway. Also several ticket booths were relocated from the speedway to the fair grounds. The property remained vacant for several years until the mid-1980s when a Hilton hotel was built on turn 4 of the old speedway site. It was the first multiple-story building of its kind in the City of Ontario. By the mid-2000s, development on the property had increased. In 2007, much of the remainder of the property became Piemonte, a mixed-use development with condominiums, business offices, and some retail stores. In the fall of 2008, the centerpiece of Piemonte opened: the Citizens Business Bank Arena (now Toyota Arena), an 11,000-seat sports and entertainment venue. The arena is home to the AHL Ontario Reign and is built in the infield area of the old Ontario track. The Ontario Mills shopping mall is located to the east, across the street from the former site of the Speedway. A minor tribute to the racing heritage of the property can be seen in the nearby street names (ex: Duesenberg Drive, Ferrari Lane, and others), in much the same way that the developed area that was formerly Riverside International Raceway reflects the same heritage, with roads named after famous drivers. On the west side of the former raceway is a park dedicated to OMS. The only remains of OMS is on the northwest side of the property where you can see the remains of turn 3 of the old oval in satellite views. Subsequent racing events After the failure of the California 500, the IndyCar series replaced the race with the Michigan 500 at Michigan International Speedway. Eight years later in 1988, Riverside International Raceway (in nearby Riverside) was also sold and demolished in favor of development. In 1997, the Auto Club Speedway opened in Fontana, less than from the former site of the OMS, and the two names were sometimes confused. (The California track was called the California Speedway before a naming rights deal was signed in February 2008.) Past winners California 500 Datsun Twin 200 From 1977 to 1980, a second Champ Car event was run at Ontario, sharing the bill with a stock car race. It was first joined by USAC Stock Car, and in 1980, when the race joined the CART calendar, by the NASCAR Winston West Series. Questor Grand Prix The race, held on 28 March 1971, was open