Lugnåsberget is one of our smallest table mountains as well as the northernmost one. It reaches a maximum height of 155 metres above sea level. Lugnåsberget consists almost exclusively of sandstone, except for a small layer of alum shale at the top. The dolerite layer here was probably very thin, or non-existent – thus the mountain lacked a protective cap and the sedimentary rocks have eroded away. From the 12th century to the early 20th, Lugnåsberget was a centre for millstone mining. Traces of the millstone production can still be seen on and around the mountain in the form of some 600 quarries and 55 mines.