The nature reserve is about 300 square kilometres and is by far the largest region of its kind in Iceland. It is bordered in the east by the districts of Gullbringa and Árnessýsla and in the north it connects with the Bláfjöll nature reserve.
A large nature reserve ideal for recreation and to explore in the nature.
The nature reserve is about 300 square kilometres and is by far the largest region of its kind in Iceland. It is bordered in the east by the districts of Gullbringa and Árnessýsla and in the north it connects with the Bláfjöll nature reserve. The western borders of the nature reserve are west of Undirhlíðar and Núpshlíðarháls hill and a straight line to the sea at Selatangar, a former fishermens´ station. The southernmost borders follow the coastline. The only big lake is Kleifarvatn. The land is very hilly, two very distinctive ridges cut through the landscape in NA-SV direction and they are about 300-400 metres above sea level, Núpshlíðarháls and Sveifluháls. Brennisteinsfjöll are located in the easternmost part of the nature reserve and there are a few mountains that are 500-600 metres above sealevel. Seltún is very active hotspring area and was once to become the source for providing the Hafnarfjörður municipality with hot water for space heating. On the coast is the largest birdcliff on the peninsula, Krýsuvíkurberg, where approx. 50.000 seabirds are nesting. Easy access hiking and walking trails are to be found in many places and attractive ponds and lakes are on top of some of the hills.
