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).
| Representing | ||||||
|---|---|---|---|---|---|---|
| 1987 | Zagreb, Yugoslavia | 16th (h) | 3000 m | 9:31.69 | ||
| 1994 | Helsinki, Finland | - | Marathon | DNF | ||
| 1995 | World Championships | Gothenburg, Sweden | - | Marathon | DNF | |
| 1996 | Atlanta, United States | 5th | Marathon | 2:30:50 | ||
| 1997 | Athens, Greece | 21st | Marathon | 2:42:18 | ||
| 1998 | Budapest, Hungary | 6th | Marathon | 2:29:53 | ||