Holmavatnet is a lake the Setesdalsheiene mountains of Southern Norway. It is located on the border of the municipalities of Suldal (in Rogaland county), Vinje (in Telemark county), and a small part in Bykle (in Agder county). The southeastern corner of the lake is in Bykle, and it is the northernmost part of all of Aust-Agder county. The lake Skyvatn is located about 5 km to the south of the lake. The lake lies in a very isolated area with road access only from the village of Nesflaten in Suldal, about 20 km to the southwest. The other villages that are located near the lake are Hovden in Bykle, about 18 km to the southeast, Håra in Odda, Hordaland, about 25 km to the northwest, and Edland in Vinje, about 22 km to the northeast.