Paardekraal Pass traverses a long unnamed ridge, a spur of the Magaliesberg, that separates Krugersdorp from the south-western suburbs of Johannesburg. It derives its name from the original farm on which both the pass, and Krugersdorp itself, was established. The road carries a very high volume of traffic, even at night and over weekends, as this is the primary route which connects Krugersdorp to Pretoria, so try to avoid it at peak times if you can.
Fortunately, it has been constructed as a double highway, with multiple lanes in both the ascending and descending directions, so unless you get stuck behind trucks that are overtaking one another (a common occurrence), you should not encounter any problems. Magnificent views over the farms and smallholdings of the Muldersdrift area to the north are presented, but it would be both illegal and highly dangerous to stop anywhere along the length of the pass.
