She was the first woman to win a Unitded States national title in cycling.
[1] A 15-year-old resident of Belleville, New Jersey, she won the first United States national women's cycling championship, which was held in Buffalo, New York in 1937.
[1][2] Her father, Joseph Kopsky, had participated in the 1912 Olympic Games in Stockholm and started in the street race and trained his daughter.
She married a cyclist, Paul Muller, and ended her athletic career.
In 1992, Doris Kopsky Muller was inducted into the United States Bicycling Hall of Fame.