Hóp is on the border of Vestur- and Austur-Húnavatnssýslna and is the fifth largest lake in the country, about 44 km² in size. Fishing is permitted in the whole lake and there are many good fishing spots. Resident char, sea char, sea trout and a considerable number of salmon are caught in Hópi every year, as good numbers of salmon pass through it into the rivers Víðidalsá and Gljúfurá. It is easy to get to Hópi, as it is close to Highway 1 via Húnaþing. At low tide a long sand reef becomes visible that reaches a long way across the lake and is a very popular riding route.