The women's 400 metres event at the 2014 World Junior Championships in Athletics was held in Eugene, Oregon, USA, at Hayward Field on 23, 24 and 25 July.
[1][2][3][4][5][6] 25 July Start time: 20:29 Temperature: 25 °C Humidity: 41 % 24 July First 2 in each heat (Q) and the next 2 fastest (q) advance to the Final First 2 in each heat (Q) and the next 2 fastest (q) advance to the Final 25 July Start time: 19:03 Temperature: 23 °C Humidity: 44% 25 July Start time: 19:11 Temperature: 22 °C Humidity: 46% 25 July Start time: 19:17 Temperature: 22 °C Humidity: 46% 23 July First 4 in each heat (Q) and the next 4 fastest (q) advance to the Semi-Finals First 4 in each heat (Q) and the next 4 fastest (q) advance to the Semi-Finals 25 July Start time: 11:34 Temperature: 16 °C Humidity: 82% Note: IAAF Rule 163.3(a) - Lane infringement 25 July Start time: 11:40 Temperature: 16 °C Humidity: 88% Note: IAAF Rule 163.3(a) - Lane infringement 25 July Start time: 11:47 Temperature: 16 °C Humidity: 88% 25 July Start time: 11:52 Temperature: 16 °C Humidity: 88% Note: IAAF Rule 163.3(a) - Lane infringement 25 July Start time: 11:57 Temperature: 16 °C Humidity: 88% According to an unofficial count, 35 athletes from 29 countries participated in the event.