Margaret Keyes Groos (born September 21, 1959) is a retired female long-distance runner from the United States. She set her personal best (2:29:50) in the marathon on May 1, 1988, winning the Pittsburgh Marathon. She was born in Nashville, Tennessee.
- All results regarding marathon, unless stated otherwise
|Representing United States|
|1988||Pittsburgh Marathon||Pittsburgh, United States||1st||2:29:50|
|Olympic Games||Seoul, South Korea||39th||2:40:59|
|1989||Pittsburgh Marathon||Pittsburgh, United States||1st||2:32:39|
On February 20, 1981 at Blacksburg VA Groos set a world indoor record for 5000 meters. Her time was 15:34.5.
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