| Olympic 20-24 Female | | Lap 3 |
| Rnk | Bib |  | Name | Lap 3 | End of Lap 3 |
| 1 | 505 | | Karlyn Elford | 1:12:04.5 (3) | 1:32:22.6 |
| 2 | 508 | | Sarah MacArthur | 1:09:18.3 (1) | 1:32:31.7 (+9.0) |
| 3 | 507 | | Jessie Lilly | 1:10:18.6 (2) | 1:34:32.1 (+2:09.4) |
| 4 | 512 | | Erica Prins | 1:18:04.5 (6) | 1:40:55.1 (+8:32.4) |
| 5 | 503 | | Nadine Brenaut | 1:16:24.8 (5) | 1:43:59.1 (+11:36.5) |
| 6 | 502 | | Catherine Alcorn | 1:18:24.6 (7) | 1:44:16.9 (+11:54.2) |
| 7 | 511 | | Katharine McCarthy | 1:14:50.1 (4) | 1:46:17.3 (+13:54.7) |
| 8 | 509 | | Erin MacDonnell | 1:25:58.0 (12) | 1:51:34.9 (+19:12.3) |
| 9 | 513 | | Amanda Schafenacker | 1:21:55.8 (8) | 1:55:25.8 (+23:03.1) |
| 10 | 504 | | Amanda Chubb-Way | 1:25:05.1 (11) | 1:55:29.2 (+23:06.6) |
| 11 | 515 | | Jessica Williams | 1:24:14.8 (10) | 1:55:43.2 (+23:20.6) |
| 12 | 506 | | Andrea Heavener | 1:21:59.8 (9) | 1:58:00.3 (+25:37.7) |
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