All the public roads in the area can be used for mountain biking.
There are five official mountain bike routes in the area which all cost the day visitor fee per person:

Kromrivier
Gonnafontein
Permits from the office at Kromrivier

Dwarsrivier
Lot’s Wife: 2,5km
Wolfberg: 7,5km
Wolfberg/Lot's Wife loop via Kliphuis: 32km
Permits from the office at Dwarsrivier

Nuwerust
Klippiesdal: 4km (permit)
Wupperthal: 80km (no permit)
Langkloof: 40km (no permit)
Permits from the office at Nuwerust

MOUNT CEDER
Olive Grove: 10km
A cycle route suitable for the whole family.  The route meanders with ups and downs through the olive groves taking in rocky and sandy terrain.
Permits from the office at Mount Ceder