María del Rosario Sánchez Guerrero (born October 26, 1973 in Ciudad de México, Distrito Federal) is a female track and field athlete from Mexico, who competed in race walking. She represented her native country at the 2004 Summer Olympics in Athens, Greece.
| Year | Competition | Venue | Position | Event | Notes |
|---|---|---|---|---|---|
| Representing Mexico | |||||
| 1995 | World Championships | Gothenburg, Sweden | 37th | 10 km | 00:46:54 |
| 1998 | Central American and Caribbean Games | Maracaibo, Venezuela | 2nd | 10,000 m | |
| 1999 | World Race Walking Cup | Mézidon-Canon, France | 12th | 20 km | |
| Pan American Games | Winnipeg, Canada | 2nd | 20 km | 01:34:46 | |
| World Championships | Seville, Spain | 34th | 20 km | 01:41:04 | |
| 2002 | World Race Walking Cup | Turin, Italy | 12th | 20 km | |
| Central American and Caribbean Games | San Salvador, El Salvador | 2nd | 20 km | ||
| 2003 | Pan American Race Walking Cup | Chula Vista, United States | 1st | 20 km | 01:37:14 |
| Pan American Games | Santo Domingo, Dominican Republic | 2nd | 20 km | 01:35:21 | |
| World Championships | Paris, France | — | 20 km | DNF | |
| 2004 | Olympic Games | Athens, Greece | — | 20 km | DNF |
| 2010 | Central American and Caribbean Games | Mayagüez, Puerto Rico | 3rd | 20 km | 01:22:30 |