Constantiaberg, Mountain summit in Cape Peninsula, South Africa

Constantiaberg is a mountain summit on the Cape Peninsula in South Africa, reaching around 927 meters and forming the southern end of the Table Mountain range. A tall VHF transmission mast stands at its peak, making the summit easy to spot from across the city.

The mountain's lower eastern slopes were later planted with commercial pine and gum plantations, now the Tokai forest, worked through gravel roads and hiking trails. A tarred road was built to the summit, where a 148 m VHF mast was constructed in 1962 to transmit local television and radio signals and support cellular networks. The South African Weather Service keeps a radar installation there.

The mountain's name links it to the Constantia valley below, and its eastern profile is read as an elephant, with the ridge running toward Cape Point as the trunk; Elephant's Eye cave sits near the southern end. The vegetation is Peninsula Sandstone Fynbos, an endangered type found nowhere outside Cape Town.

Several marked trails lead to the summit, with the most common access coming from the Tokai Forest to the east. Conditions at this elevation can shift fast, so bringing a windproof layer and water is a good idea regardless of how the morning starts.

A weather radar installation at the peak is operated by the South African Weather Service to track conditions across the peninsula. This makes Constantiaberg one of the few hiking summits in the country that also functions as an active node in the national forecasting network.