| Olympic 20-24 Female | | Lap 4 |
| Rnk | Bib |  | Name | Lap 4 | End of Lap 4 |
| 1 | 505 | | Karlyn Elford | 00:52.2 (1) | 1:33:14.8 |
| 2 | 508 | | Sarah MacArthur | 00:57.7 (2) | 1:33:29.5 (+14.6) |
| 3 | 507 | | Jessie Lilly | 01:09.4 (4) | 1:35:41.5 (+2:26.6) |
| 4 | 512 | | Erica Prins | 01:05.0 (3) | 1:42:00.2 (+8:45.4) |
| 5 | 503 | | Nadine Brenaut | 01:09.7 (5) | 1:45:08.9 (+11:54.0) |
| 6 | 502 | | Catherine Alcorn | 01:10.2 (6) | 1:45:27.2 (+12:12.3) |
| 7 | 511 | | Katharine McCarthy | 01:29.2 (8) | 1:47:46.5 (+14:31.7) |
| 8 | 509 | | Erin MacDonnell | 01:19.0 (7) | 1:52:54.0 (+19:39.2) |
| 9 | 504 | | Amanda Chubb-Way | 01:36.2 (9) | 1:57:05.6 (+23:50.7) |
| 10 | 515 | | Jessica Williams | 02:01.4 (11) | 1:57:44.7 (+24:29.8) |
| 11 | 513 | | Amanda Schafenacker | 02:37.0 (12) | 1:58:02.8 (+24:47.9) |
| 12 | 506 | | Andrea Heavener | 01:42.5 (10) | 1:59:43.0 (+26:28.1) |
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