Cathy O'Brien

While attending Dover High School in New Hampshire, Cathy qualified for the 1984 Olympic Trials Marathon in her first marathon, at 2:45.07. In the trials, held in Olympia, Washington, when she was only 16 years old, she ran 2:34:24. She finished in 9th place after being a legitimate contender for third place on the team, until fading in the last few miles. Her time there still stands as the national high school record and the national junior women's record in the marathon. She competed in the United States Olympic Trials Marathon two more times in 1988 and 1992. In the Olympic Trials Marathon in 1988 (May 1) in Pittsburgh, she finished third in a time of 2:30:18, which qualified her for the US Olympic team. O'Brien then placed 40th in the women's marathon at 1988 Summer Olympics in Seoul, South Korea. In the Olympic Trials Marathon in 1992 (January 26), in Houston, she finished second in a time of 2:30:28, qualifying her for the 1992 Summer Olympics in Barcelona, Spain. O'Brien was 10th overall and the top-finishing American.

Cathy Schiro O'Brien (born July 19, 1967 in Janesville, Wisconsin) is a retired female long-distance runner from the United States. She was an Olympian, and she holds the US women's high school record in the marathon. O'Brien set her personal best (2:29:38) in the women's marathon when she won the women's Los Angeles Marathon in 1991.