The Hex River Mountains (Afrikaans: Hexrivierberge) make up the second highest mountain range in the Western Cape province of South Africa and are located 120 kilometres (75 miles) north-east of Cape Town.

The vegetation is primarily montane fynbos and the mountains fall within the Cape's Mediterranean climate.

The mountains provide some rudimentary snow-skiing opportunities in winter, with the Western Cape's heaviest snowfalls occurring in and around these ranges.

The surrounding valleys support intensive deciduous fruit cultivation, mostly in the form of cherries and table grapes.

Block streams and terraces found in the near the summit of Matroosberg evidences past periglacial activity, which occurred likely during the Last Glacial Maximum.