| Boralday | |
| Mouth: | Arys |
| Mouth Coordinates: | 42.5953°N 69.3455°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Kazakhstan |
| Pushpin Map: | Kazakhstan |
| Pushpin Map Caption: | Mouth location in Kazakhstan |
The Boralday (Kazakh: Боралдай, Boraldai) is a river of southern Kazakhstan. It is a right tributary of the Arys, of the Syr Darya basin.[1]
