瓦尔河 （Vaal）是南非橘河最大的支流，瓦尔河的源头在姆普马兰加省的龙山山脉，在金伯利与橘河汇流。海拔1829公尺，全长约1120公里。 Vaal在荷兰语中为灰色之意，因河水泛滥时的颜色而得名。

The Vaal River (pronounced /ˈfɑːl/ and alternatively /ˈvɑːl/, especially by English speakers) is the largest tributary of the Orange River in South Africa. The river has its source near Breyten in Mpumalanga province, east of Johannesburg and about 30 kilometres (19 mi) north of Ermelo and only about 240 kilometres (150 mi) from the Indian Ocean. It then flows westwards to its conjunction with the Orange River southwest of Kimberley in the Northern Cape. It is 1,120 kilometres (700 mi) long, and forms the border between Mpumalanga, Gauteng and North West Province on its north bank, and the Free State on its south.