Park on side of the road at a picnic table on route 54 near the farm Hamrar. The hike shown on the map and on the GPS file follows the green plastic stakes most of the time. After you cross the fence through the gate, then continue diagonally uphill. This takes you to the ridge above. You are hiking through older Tertiary basalts that have been highly metamorphosed, as well as some intrusions of dikes and sills, including rhyolites. As you hike along the ridge, you come to an outcrop of a very thick andesite lava flow, which is about one million years old (“andesit” on map). This is one of three thick lava flows that form a prominent west-facing cliff in the mountain. Walk along the base of the cliff, following the sheep path. Soon you come to outcrops of conglomerate that underiles the andesite lava flow (“congl” on map). There is a 1 meter thick andeiste sill that has intruded the clonglomerate, or the contact between conglomerate below and andesite lava above. The conglomerate is at approximately the same horizon as conglomerates and other sediments in Kirkjufell, Stöð and Búlandshöfði further to the west. It marks a major discontinuity in the geologic history of Snæfellsnes. Below it are the Tertiary formations, and above it are much younger volcanics. Backtrack at the base of the cliff and return to the point marked “andesit” on map. Then continue uphill and follow the ridge to the south. You come soon to another andesite lava outcrop and you can continue up hill here, if you are a good climber. Otherwise hike down to the east, into the green and inviting valley. This will take you back to the parking area.