The Bronkhorst Spruit, meaning watercress stream or creek, is a river in the Mpumalanga and Gauteng provinces of South Africa.

It flows generally northwards and its main tributary, the Delmas River, joins its left bank.

It finally has a confluence with the Wilge River some 10 km east of the town,[4] at Premiermyn Dam, Gauteng.

When a group of Voortrekkers arrived at it in 1858, they called it the Kalkoenkransrivier, suggesting a breeding site of bald ibis, and on Merensky's map of 1875 it (including the current lower Wilge) is the Rhenosterpoortrivier.

[5] In 1880 this river was the scene of the action at Bronkhorstspruit, a battle between a Boer commando under the command of Frans Joubert and British troops under Lieutenant-Colonel Anstruther.