Lieutenant James Harold Doolittle, Air Service, United States Army, won the Coupe d’Aviation Maritime Jacques Schneider (commonly called the Schneider Trophy) when he placed first flying his Curtiss R3C-2 float plane over a 217-mile (349 kilometer) course near Bay Shores on Chesapeake Bay, Maryland. Doolittle’s average speed for the seven laps around the triangular race course was 232.57 miles per hour (374.29 kilometers per hour).
Credit and more info at This Day in Aviation