Dreyfus continued to race sporadically, including the 1952 24 Hours of Le Mans. His last race was the 12 Hours of Sebring in 1955, when Stanley "Wacky" Arnolt asked Dreyfus to captain the Arnolt-Bristol Racing Team. Dreyfus led the team to the Sebring Team Trophy and 1–2–3 in class. In 1980 he was invited back to the Monaco Grand Prix to celebrate the 50th anniversary of his victory. At age 75, he personally drove throughout Europe touring all the sites of his racing career, receiving public celebration and honors at each stop. At the banquet following the race, he was brought to the stage to sit once again in the Bugatti in which he had won, half a century earlier. He was also Grand Marshal of the 1980 United States Grand Prix at Watkins Glen.