Coogan attended Phillips Exeter Academy for two years, where she played squash and field hockey. She then attended Smith College, graduating in 1987, where she majored in mathematics and took up running for the first time, and became the two-time NCAA Division III champion in the 3,000 meters. She qualified for the 1992 Summer Olympics in Barcelona, where she competed in the 10,000 meters. Four years later, she was an alternate for the women's marathon for the 1996 Summer Olympics in Atlanta.[1] She was the United States national champion in the marathon in 1998.[2]