Þorbjörn - gönguleið

Background

History & Background

Þorbjörn formed during the last glacial period in a subglacial eruption. During the Second World War Allied forces established a position in the summit depression and constructed a road up the mountain. Remains from that occupation can still be seen.

Þorbjörn is a compact but remarkably layered hiking destination directly north of Grindavík. The mountain rises to 243 metres and was formed during the last glacial period by an eruption beneath ice. Fault movement later cut across the mountain and created a shallow graben at the top, giving the summit area a distinctive broken structure. Reykjanes Geopark describes the hike as around 3–5 kilometres and roughly one hour, although visitors can extend the outing by exploring different summit routes or walking around the mountain. Paths approach from the north and east, including the old vehicle road. Selskógur, a planted woodland at the northern foot, provides a contrasting recreational area below the bare volcanic slopes. Þorbjörn also preserves evidence from the Second World War. Allied forces used the summit depression as a base or observation position and built a road up the mountain; remains of military structures are still visible. The best-known folklore belongs to Þjófagjá. According to the story, fifteen thieves hid in the fissure and stole livestock from people in Grindavík. They were eventually captured after being tricked while bathing at Baðsvellir north of the mountain. Current volcanic conditions around Grindavík can affect access. Check official safety information before hiking, especially during periods of seismic or eruptive unrest.