# Cycling at the 2012 Summer Olympics – Women's BMX

The women's BMX racing competition at the 2012 Olympic Games in London took place at the BMX track at the Velopark within the Olympic Park, from 8 to 10 August.
Mariana Pajón from Colombia won the gold medal — the only at the 2012 Games for the country — with a winning time of 37.706 seconds. Sarah Walker from New Zealand won the silver medal and Laura Smulders of the Netherlands took bronze.

## Competition format

The riders were seeded into semi-finals based on time trials. The semi-finals consist of three runs, with the top four riders in each group advancing to the final. The final was a one-run contest.

## Schedule

All times are British Summer Time (UTC+1)
| Date | Time | Round |
| Wednesday 8 August 2012 | 15:00 | Qualification |
| Friday 10 August 2012 | 15:00 | Semi-finals and final |

## Results
### Seeding run

| Rank | Name | Country | Time | Notes |
| 1 | Caroline Buchanan | Australia | 38.434 | |
| 2 | Sarah Walker | New Zealand | 38.644 | |
| 3 | Mariana Pajón | Colombia | 38.787 | |
| 4 | Laëtitia Le Corguillé | France | 38.976 | |
| 5 | Shanaze Reade | Great Britain | 39.368 | |
| 6 | Laura Smulders | Netherlands | 39.420 | |
| 7 | Magalie Pottier | France | 39.778 | |
| 8 | Alise Post | United States | 39.890 | |
| 9 | Lauren Reynolds | Australia | 40.045 | |
| 10 | Aneta Hladíková | Czech Republic | 40.846 | |
| 11 | Romana Labounková | Czech Republic | 41.096 | |
| 12 | Stefany Hernández | Venezuela | 41.253 | |
| 13 | Sandra Aleksejeva | Latvia | 41.752 | |
| 14 | Vilma Rimšaitė | Lithuania | 42.162 | |
| 15 | Squel Stein | Brazil | 42.995 | |
| – | Brooke Crain | United States | | DNF |

### Semi-finals
#### Semi-final 1

| Rank | Name | 1st run | 2nd run | 3rd run | Total | Notes |
| 1 | Caroline Buchanan (AUS) | 38.276 (1) | 40.296 (2) | 38.482 (1) | 4 | Q |
| 2 | Shanaze Reade (GBR) | 39.029 (2) | 38.858 (1) | 38.634 (2) | 5 | Q |
| 3 | Brooke Crain (USA) | 40.668 (5) | 41.029 (4) | 40.099 (5) | 14 | Q |
| 4 | Laëtitia Le Corguillé (FRA) | 39.902 (4) | 1:20.324 (8) | 38.759 (3) | 15 | Q |
| 5 | Stefany Hernández (VEN) | 1:12.935 (8) | 40.513 (3) | 39.466 (4) | 15 | |
| 6 | Alise Post (USA) | 39.495 (3) | 51.752 (7) | DNF (8) | 18 | |
| 7 | Sandra Aleksejeva (LAT) | 42.030 (7) | 43.159 (6) | 42.855 (6) | 19 | |
| 8 | Lauren Reynolds (AUS) | 41.103 (6) | 41.441 (5) | DNF (8) | 19 | |

#### Semi-final 2

| Rank | Name | 1st run | 2nd run | 3rd run | Total | Notes |
| 1 | Mariana Pajón (COL) | 38.759 (1) | 38.749 (1) | 38.845 (1) | 3 | Q |
| 2 | Magalie Pottier (FRA) | 39.342 (2) | 38.828 (2) | 39.048 (2) | 6 | Q |
| 3 | Laura Smulders (NED) | 39.886 (4) | 39.175 (3) | 39.660 (4) | 11 | Q |
| 4 | Sarah Walker (NZL) | 39.905 (5) | 39.348 (4) | 39.344 (3) | 12 | Q |
| 5 | Aneta Hladíková (CZE) | 39.728 (3) | 40.393 (6) | 43.752 (7) | 16 | |
| 6 | Romana Labounková (CZE) | 40.624 (6) | 39.883 (5) | 40.777 (6) | 17 | |
| 7 | Vilma Rimšaitė (LTU) | 41.789 (7) | 40.897 (7) | 40.400 (5) | 19 | |
| 8 | Squel Stein (BRA) | DNF (8) | DNS (10) | DNS (10) | 28 | |

### Final

| Rank | Name | Time |
| | Mariana Pajón (COL) | 37.706 |
| | Sarah Walker (NZL) | 38.133 |
| | Laura Smulders (NED) | 38.231 |
| 4 | Laëtitia Le Corguillé (FRA) | 38.476 |
| 5 | Caroline Buchanan (AUS) | 38.903 |
| 6 | Shanaze Reade (GBR) | 39.247 |
| 7 | Magalie Pottier (FRA) | 39.395 |
| 8 | Brooke Crain (USA) | 40.286 |