Rietvlei Nature Reserve, located in southern Pretoria, is about 4,000 hectares (40 km2)[1] in size, and includes the entirety of the Rietvlei Dam which impounds the Rietvlei River, in Gauteng, South Africa. The reserve is wedged between the R21 highway (OR Tambo Airport highway) on the western side and the R50 (Delmas-Bapsfontein) road on the north-east. The mean elevation above sea level is approximately 1,525 meters, with the highest point at 1,542 m and the lowest at 1,473 m, the dam’s outflow in Sesmylspruit. The reserve covers a surface area of approximately 4,003 ha or 40 km2, of which the dam constitutes some 20ha. A network of roads criss-cross the entire area, which facilitates access to visitors and management. The reserve carries around 1,600 individual large mammals. Cheetah, blesbuck, black wildebeest, red hartebeest, eland, common zebra, waterbuck, reedbuck, springbuck, mountain reedbuck, steenbok, grey duiker, oribi, leopard, buffalo, and hippopotamus can all be found in the reserve.