The peak of Þóristindur (Thóristindur) rises between the Highland Center at Hrauneyjar and Veiðivötn. The mountain is of volcanic origin, it is a "móbergshryggur" (tuff ridge) which is indicative of a sub-glacial eruption. A path has been marked off. It is short but rather strenuous, taking about 2 hours. From the road to Veiðivötn it is best to head to the pass between the highest peak and the next one to the east. The path goes over steep scree before turning to the highest point. It is best to proceed carefully and to use a stick for support. The mountain has a wide base rising from Lake Þórisvatn to a narrower peak 822 meters above sea level that is visible over a wide area and easily recognizable by its rocky shape. In clear weather the view from the top is stupendous. Þóristindur is named for the outlaw Þórir (Thórir) who once lived at Þóristunga and who has given his name to other places in the area like Lake Þórisvatn and Þórisós estuary.