That would be the Kouga Dam, so I guess Baviaanskloof is the answer. Is that specific enough?
Yeb 
It is the Kouga Dam. The location is actually in the
Grootrivierpoort, approximately 30 km from Patensie. The 2008 EC WD Bash was held nearby. It is not strictly speaking the Baviaanskloof as yet, as the wilderness area only starts about 10 km to the west.