Born April 20, 1927, in Miami, Florida, Hill was raised in Santa Monica, California, where he lived until his death. He studied business administration at the University of Southern California from 1945 to 1947, where he was a member of the Kappa Sigma fraternity. Hill left early to pursue auto racing, working as a mechanic on other drivers' cars. Hill began racing cars at an early age, going to England as a Jaguar trainee in 1949 and signing with Enzo Ferrari's team in 1956. He made his debut in the French Grand Prix at Reims France in 1958 driving a Maserati. That same year, paired with Belgian teammate Olivier Gendebien, Hill became the first American-born winner of the 24 Hours of Le Mans with Hill driving most of the night in horrific rainy conditions. He and Gendebien would go on to win the famous endurance race again in 1961 and 1962.