Arcadia sits 20 minutes east of downtown Los Angeles on the I-210, a straightforward drive outside rush hours. From downtown LA, the Metro A Line (formerly Gold Line) light rail runs out to Arcadia station near the racetrack — about 40 minutes from Union Station, with trains every 7–12 minutes during the day.
There is no airport in Arcadia itself. Los Angeles International (LAX) is about an hour by car or longer in traffic; Burbank (BUR), Long Beach (LGB), and Ontario (ONT) are alternatives, none more than 45 minutes away. Drivers from Las Vegas or Palm Springs reach Arcadia via the I-15 and I-210 in about four hours.