Rosecroft Raceway, nicknamed the "Raceway by the Beltway" for being close to Interstate 495, is a harness racing track in Fort Washington, Maryland. It first opened in 1949 and was owned by William E. Miller, a horse trainer and breeder. Rosecroft quickly became Prince George's County's political and social center, drawing thousands of people there each racing day. In the early 1950s, average attendance was more than 7,000 per day. After Miller died in 1954, his son John owned Rosecroft until his death in 1969. Rosecroft hosted memorial stake races annually for both William and John until 1995. Following the death of John Miller, Earle Brown controlled operations until he moved to a different position in 1980; William E. Miller II took over following Brown.