Blanca Barrón had the following podium finishes at major championships: 3rd in the 1959 Pan American Games 4×100 metres freestyle (with María Luisa Souza and the non-Olympians Gloria Botella and Rebeca García), 3rd in the 1959 Pan American Games 4×100 metres medley (with Eulalia Martínez and the non-Olympians Rebeca García and Gloria Botella).
|1956 Summer||22||Melbourne||Swimming||Women's 100 metres Freestyle||Mexico||MEX||5 h3 r1/3|
|1960 Summer||26||Roma||Swimming||Women's 100 metres Freestyle||Mexico||MEX||6 h1 r1/3|
|1960 Summer||26||Roma||Swimming||Women's 400 metres Freestyle||Mexico||MEX||7 h3 r1/2|
|1960 Summer||26||Roma||Swimming||Women's 4 × 100 metres Freestyle Relay||Mexico||MEX||6 h1 r1/2|
|1956 Summer||22||Melbourne||Swimming||Mexico||Round One||Heat Three||5||1:09.5|
|1960 Summer||26||Roma||Swimming||Mexico||Round One||Heat One||6||1:07.9|
|1960 Summer||26||Roma||Swimming||Mexico||Round One||Heat Three||7||5:26.4|