Brukkaros Mountain (Khoekhoe: Geitsi Gubib) is a collapsed caldera in the ǁKaras Region, Namibia.

It is formed of an indistinctly bedded red-brown microbreccia, made up of finely fragmented rocks of the Nama System that were blown out when the caldera collapsed about 80 million years ago.

At its head is a dry waterfall, over which the stream plunges down some 45 m after rain, and the river bed directly below the fall is the principal source of water.

The Nama called the mountain Geitsi Gubib after the long, flowing loincloth worn by Khoikhoi women, known in Afrikaans as broek-en-karos ("trousers and kaross"), rendered in German to Brukkaros.

[citation needed] Whilst her husband ran the observatory in the early 1930s, ornithologist Margaret Sordahl collected natural science specimens for the museum.