The Touw River Pass forms part of the well-known 7 Passes Road in the Garden Route and is the 4th of the official passes when travelling west to east. The road was built circa 1883 by Adam de Smidt, the brother in law, of Thomas Bain - pass builder extraordinaire. This is a gravel road and remains virtually unchanged from its original route, with the one exception that the original timber bridge was washed away. This was replaced with a steel bridge in the 1900's.
It has similar characteristics to the Kaaimansgat and Silver River passes. It's 2.5 km long and has an altitude variance of 92m with the same inverted vertical profile typical of a pass that descends through a river gorge and rises up the other side.
Of the seven rivers crossed on the 7 Passes Road, the Touw River is the biggest and the most prone to flooding. It is most likely that this pass was also built by Adam de Smidt, as Thomas Bain was held up for a long period with the construction of the Homtini Pass, which proved to be the most difficult of the seven.