María Rocío Ríos Pérez (born 13 March 1969, León, Spain) is a retired female long-distance runner from Spain, who represented her native country at the 1996 Summer Olympics in the women's marathon race, finishing in fifth place.
A resident of Gijón, Ríos set her personal best (2:28:20) in the classic distance on 15 October 1995 in San Sebastián.
She is a four-time national champion in the 10,000 metres (1992, 1993, 1996, and 1997), and a three-time national champion in the half marathon (1992, 1994, and 1995).
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