Hoag first raced in 1949 after a new track opened near Naples, New York. He purchased his first race car for $175 from Bob Ratcliffe and towed it to the track on a chain. By the end of that year he had won his first feature event, at the Civic Stadium in Corning, New York. Over the following years, Hoag established himself as a dominant presence at weekly tracks across New York State, competing in Stock Car, Sportsman, and Modified divisions.
Hoag accumulated track titles at numerous venues throughout New York State. He won three consecutive Stock division championships at Bath Speedway from 1952 through 1954, and six championships at Monroe County Fairgrounds in Rochester between 1952 and 1967. He claimed Sportsman titles at Hemlock Fairgrounds and Canandaigua Speedway, the latter propelling him to the 1954 NASCAR New York State Sportsman Championship.
In the Modified division, Hoag won championships at Shangri-La Speedway in Owego and three consecutive titles at Spencer Speedway in Williamson from 1965 to 1967. He also won the unofficial New York State Modified Championship at the New York State Fairgrounds in Syracuse in both 1967 and 1968, the first two years that cars with overhead-valve engines were permitted to compete in the event.
The Langhorne National Open was the premier event for weekly Modified and Sportsman racers, drawing track champions from across the country to compete at a large, fast speedway where no driver held a home-track advantage. Hoag won the event five times across more than a decade.
His first victory came in 1956, driving Hal Kempeny's 1937 Ford coupe — not his regular car — equipped with a Ford overhead-valve V-8 engine. Hoag won again in 1960 and 1963, both times driving for car owner Dave McCredy as a teammate to Bill Wimble, a two-time NASCAR national Sportsman champion. In 1967, he won driving for the Turner Brothers, the car owners with whom he shared over one hundred feature wins at tracks around New York State. His fifth and final Langhorne victory came in 1968, in a car sponsored by road-construction firm owner Gene DeWitt — who later gained national recognition as the car owner behind Richie Evans when Evans won nine NASCAR national Modified championships. Hoag won the 1968 race by a full lap.
Hoag's unique distinction was being the only driver to win the Langhorne National Open on both the dirt surface (1956, 1960, 1963) and after the track was paved with asphalt (1967, 1968).
Hoag raced in four NASCAR Grand National events: one in 1952 at Monroe County Fairgrounds, two in 1955 at Palm Beach Speedway and Monroe County Fairgrounds, and one in 1957 at Langhorne Speedway. His best finish was eighth, at Palm Beach in 1955. In 1969, Hoag raced a 1965 Dodge built for Grand National racing by Ray Fox in the Permatex 300 for Late Model Sportsman cars at Daytona International Speedway, finishing second to Lee Roy Yarbrough.
Hoag's influence extended beyond his own career. Geoff Bodine — later a multi-time NASCAR winner — got his first taste of Modified driving in Hoag's car at Shangri-La Speedway and worked on Hoag's crew in 1968 and 1969. Lee Osborne, a former motorcycle racer who became a protégé of Hoag's, went on to win 55 Modified features and three consecutive All-Star Circuit of Champions sprint car championships from 1981 to 1983.
Hoag was selected as one of thirteen charter members of the Northeast Dirt Modified Hall of Fame, and was also inducted into the New York State Stock Car Association Hall of Fame, the Eastern Motorsports Press Association Hall of Fame, and the FOAR Score Hall of Fame. Racing continued through his family: son Dean Hoag competed in Modifieds through the 1970s and won the 1996 and 1997 Oswego Speedway Limited Supermodified titles, while grandson Alex Hoag competed in multiple divisions and was named DIRT 358 Modified Rookie of the Year in 2000.
Dutch Hoag died on May 11, 2016, at the age of 89.