See main article: Cycling at the 2010 South American Games. The Women's BMX 20" wheel event at the 2010 South American Games was held on March 18. The qualifications started at 9:15 and the Final at 10:50.
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Mariana Pajón | Gabriela Díaz | Andrea Zuluaga |
| Rank | width=250 | Rider ! | width=100 | Run 1 ! | width=100 | Run 2 ! | width=100 | Run 3 ! | width=50 | Total |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 53.787 (1) | 51.251 (1) | 51.275 (1) | 3 Q | ||||||
| 2 | 1:14.869 (4) | 52.986 (2) | 52.802 (2) | 8 Q | ||||||
| 3 | 55.739 (2) | 55.427 (4) | 54.566 (3) | 9 Q | ||||||
| 4 | 58.426 (3) | 55.109 (3) | 55.705 (5) | 11 Q | ||||||
| 5 | DNF (5) | 58.498 (5) | 55.608 (4) | 14 | ||||||
| 6 | DNS (8) | DNS (8) | DSQ | |||||||
| Rank | width=250 | Rider ! | width=100 | Run 1 ! | width=100 | Run 2 ! | width=100 | Run 3 ! | width=50 | Total |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 55.503 (1) | 57.370 (1) | 52.236 (1) | 3 Q | ||||||
| 2 | 56.883 (2) | 1:02.233 (2) | 59.833 (3) | 7 Q | ||||||
| 3 | 1:04.266 (4) | 1:06.040 (3) | 52.399 (2) | 9 Q | ||||||
| 4 | 1:02.233 (3) | 1:07.290 (4) | 1:05.266 (4) | 11 Q | ||||||
| DNS (7) | DNS (7) | DSQ | ||||||||
| Rank | width=250 | Rider ! | width=100 | Run |
|---|---|---|---|---|
| 47.709 | ||||
| 48.490 | ||||
| 49.757 | ||||
| 4 | 50.964 | |||
| 5 | 54.312 | |||
| 6 | 55.314 | |||
| 7 | 55.457 | |||
| 8 | 55.689 | |||