The Majik Forest mentioned in my previous post is used by dozens of mountain-bikers, hikers, and runners every day.
The trail through the forest is a narrow one that most often doesn't allow for two people to walk side-by-side, and often results in runners or hikers quickly scrambling to the side of the track as high-speed bikers weave their way along the designated MTB trail. :)
Read a little more about the Tygerberg Mountain Bike Club and the history of the forest on their website.