| Final 17:20 Wind -0.1m/s | Team | time | | L | React. | Bib | | 1. Yvette Christine Lewis | USA | 12.82s | | 3 | 0.182 | 266 | | 2. Angela Patricia Whyte | CAN | 13.09s | | 5 | 0.161 | 68 | | 3. Lina Marcela Flores | COL | 13.09s | | 8 | 0.159 | 79 | | 4. Briggitte Maria Merlano | COL | 13.10s | | 4 | 0.159 | 86 | | 5. Maila Machado | BRA | 13.14s | SB | 2 | 0.177 | 46 | | 6. Yenima Arencibia | CUB | 13.22s | | 6 | 0.152 | 98 | | 7. Christie Lee Gordon | CAN | 13.48s | | 7 | 0.137 | 63 | | 8. Lavonne Celeste Idlette | DOM | 13.62s | | 1 | 0.155 | 132 |
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| World Record: | | Yordanka Donkova (BUL) 12.21s | | Stara Zagora (BUL) 20.08.1988 | | Panamerican Record: | | Deloreen Ennis-London (JAM) 12.65s | | Rio de Janeiro (BRA) 25.07.2007 |
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| Heats - Tuesday 25.10 - First 3 and Best progress. |
| Heat 1 15:50 Wind -0.4m/s | Team | time | | L | React. | Bib | | 1. Briggitte Maria Merlano | COL | 13.18s | | 3 | 0.146 | 86 | | 2. Angela Patricia Whyte | CAN | 13.18s | | 4 | 0.161 | 68 | | 3. Christie Lee Gordon | CAN | 13.36s | | 8 | 0.163 | 63 | | 4. Maila Machado | BRA | 13.36s | | 6 | 0.204 | 46 | | 5. Belkis Milanes | CUB | 13.56s | | 5 | 0.176 | 117 | | 6. Gabriela Belen Santos | MEX | 13.85s | | 7 | 0.182 | 201 | | 7. Winnie Daniela Castillo | ECU | 14.37s | | 2 | 0.198 | 141 |
| Heat 2 15:57 Wind +0.4m/s | Team | time | | L | React. | Bib | | 1. Yvette Christine Lewis | USA | 12.88s | | 5 | 0.167 | 266 | | 2. Yenima Arencibia | CUB | 13.13s | | 6 | 0.157 | 98 | | 3. Lina Marcela Flores | COL | 13.26s | | 8 | 0.198 | 79 | | 4. Lavonne Celeste Idlette | DOM | 13.40s | | 2 | 0.164 | 132 | | 5. Jeimmy Bernardez | HON | 13.92s | | 3 | 0.180 | 162 | | 6. Petra Mcdonald | BAH | 14.09s | | 7 | 0.161 | 14 | | 7. Giuliana Maria Franciosi | PER | 14.67s | | 4 | 0.275 | 219 |
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