| Sierra League Champs 2010 | Date: 05/03-05/06/10 Venue: Glendora High School - Glendora, CA |
| Women's 400 Freestyle Relay |
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| Place | Overall | Team | Time | Score |
|---|---|---|---|---|
| 1 | 1 | Glendora | 3:42.28 | 40 |
| 2 | 2 | St. Lucy's | 3:51.29 | 34 |
| 3 | 3 | Ayala | 4:05.08 | 32 |
| 4 | 4 | Diamond Bar | 4:14.52 | 30 |
| 5 | 1 | Glendora | 4:18.44 | 40 |
| 6 | 2 | St. Lucy's | 4:20.94 | 34 |
| 7 | 3 | Ayala | 4:21.15 | 32 |
| 8 | 5 | Chino | 4:21.50 | 28 |
| 9 | 6 | Chino Hills | 4:40.15 | 26 |
| 10 | 4 | Diamond Bar | 4:49.89 | 30 |
| 11 | 5 | Chino | 5:04.48 | 28 |
| 12 | 6 | Chino Hills | 5:17.66 | 26 |