Born in Rochester, New York, Hagen came from a working-class family of German descent. His parents were William and Louisa (Boelke) Hagen, his father worked as a millwright and blacksmith in Rochester's railroad-car shops. Walter was the second of William and Louisa's five children and the only son.  Hagen developed his golf game at the Country Club of Rochester, beginning as a caddie, and earned money to help support his family from pre-teen age. He earned ten cents per round and was occasionally tipped another five cents. Hagen played golf at every chance he got; caddie access to the course was limited to off-peak times, as it was elsewhere in the U.S. during that era. Hagen, with assistance from head professional Alfred Ricketts, gradually improved his golf skill to the stage where he was an expert player by his mid-teens, and was then hired by the club to give lessons to club members and to work in the pro shop. He made his top-class professional debut at age 19 at the 1912 Canadian Open, placing 11th, a good showing. Hagen followed up with a surprise 4th place showing at the 1913 U.S. Open at Brookline where he stated that he was treated badly by the other professionals who knew nothing about him. Hagen said "they pushed me off the tee and told me I could practice when they were through". He vowed to play in the 1914 U.S. Open and "win it", and he did exactly that.  Hagen was also very skilled at baseball, primarily as a pitcher and shortstop. He canceled a 1914 tryout for the Philadelphia Phillies in order to play in a golf tournament. Later that week, Hagen was the U.S. Open Champion, and his career was changed forever.

Answer this question "where was he born?" by extracting the answer from the text above.
Rochester, New York,