- Female 400 M Dash (16)
- 8 Advance: Top 3 Each Heat plus Next 2 Best Times
- Friday 7/21/2017 - 10:20
- Jr. World:49.428/27/1991GritBREUER, GER
- PanAm U20:51.722007BOBBY-GAYEWILKINS, JAMAICA
- Heat 1 Prelims
- 1Lucia Sotomayor Arebalo (17)Bolivia58.74
- 2Shaniyah Caul (18)Br. Virgin Is.55.86
- 3Kyra Constantine (19)Canada52.92
- 4Coraima E Cortez Villafuerte (19)Ecuador55.39
- 5Kimorle Muschette (18)Jamaica54.07
- 6Jaevin Reed (19)United States51.67
- 7Wadeline Jonathas (19)Haiti52.81
- 8Angie M Palacios Nagales (18)Colombia58.53
- Heat 2 Prelims
- 1Shaffiqua Maloney (18)St. Vin & Gren54.25
- 2Deyanira P Ortiz Torres (18)Ecuador55.92
- 3Ana E Manrique Gongora (19)Peru57.67
- 4Takyera Roberson (19)United States52.41
- 5Stacy A Williams (18)Jamaica52.62
- 6Geovana S Orozco (19)NicaraguaNT
- 7Roxana Gomez Calderon (18)Cuba51.59
- 8Jenna Smith (19)Canada54.77