Lourens River Protected Natural Environment is a section of protected land along the Lourens River in the Helderberg region, South Africa.

The Lourens River is about 23 kilometres (14 mi) long, flowing from the Hottentots Holland Mountains into False Bay at Strand.

However, the lower part of the river flows through developed areas as well as past fynbos and plantations of invasive alien trees.

This natural area is threatened by pollution as well as by invasive alien weeds such as Kikuyu grass and the Black Wattle tree.

[1] The Dick Dent Bird Sanctuary is contained within the protected area.