Borgarknappur is a mountain in Suðuroy, Faroe Islands. The mountain is 574 meter high. It is located in the center of the island, west of the village Hov and south-east of Fámjin, south-west of Øravík and north of Vágur. Another mountain peak, which is called Borgin (570 meters high) is just west of Borgarknappur, and a mountain called Hvannafelli (558 meters high) is further south. Before the roads were made between the villages in Suðuroy, there were paths between the villages over the mountains. In one place in Suðuroy several of these paths met near Borgarknappur, in a place called Mannaskarð and a mountain called Laðanfelli (487 meters high). To help people find their way up in the mountains there were cairns along the paths. Most of these cairns are still there and now mostly used for hiking trips for people who enjoy walking in the nature, including tourists. The paths which meet in Mannaskarð, near Borgarknappur come from the villages: Øravík, Fámjin, Porkeri, Hov and Vágur.