Jonkershoek is the obvious place to go to, and Tokai of course.
Paarl Taalmonument DH track is lekker if you've got someone who can shuttle you. Nice thing about the trails is that you can mix it up the whole time, so every run will not be the same.
Helderberg trails are also sweet, perhaps a bit short for all the climbing involved.
Delvera estate (Dirtopia) had a few nice trails as well (although I haven't been there in ages), other side of the R44 on Muratie's side is mostly just flowy trails.
Boschendal and the rest of the trails in that valley are mostly flow trails, but still fun. Flowy berms and a few jumps and drops.
A few Enduro events took place at Wellington's Wild Boar trails which are more natural old school trails (i.e little to no features), also haven't been there in ages, so not sure if anything has changed.