Fagradalsfjall's March 2021 eruption marked the Reykjanes Peninsula's first volcanic event in 781 years, drawing volcanologists and hikers to a fissure system that had lain dormant since the 13th century.
The eruption site, six kilometres inland from Grindavík, produced over 140 million cubic metres of basaltic lava across 4.8 square kilometres before ceasing in September 2021. A second eruption at nearby Litli-Hrutur followed in July 2023, demonstrating the peninsula's ongoing tectonic activity along the Mid-Atlantic Ridge divergent boundary where the North American and Eurasian plates separate at two centimetres annually.
The Fagradalsfjall system sits within the Reykjanes UNESCO Global Geopark, a 829-square-kilometre designation recognising volcanic landforms that span 30,000 years of eruptive history. Geothermal fields, pseudocraters, and pillow lava formations shape a terrain where subglacial eruptions during the last ice age created tuya mountains and hyaloclastite ridges. The 2021 lava field cooled into rope-textured pāhoehoe surfaces and jagged ʻaʻā flows, both accessible via marked trails that navigate hardened basalt channels. Sulfur dioxide emissions have dissipated since the eruptions concluded, allowing safe approach to the solidified magma.
Hiking terrain consists of compacted volcanic ash paths, loose scoria slopes, and ridge walks offering views across Reykjanes's geothermal infrastructure and the North Atlantic coast. Routes to the 2021 crater traverse 5.6 kilometres one way with 340 metres elevation gain, while the Litli-Hrutur site requires a shorter 3.2-kilometre approach. Weather conditions shift rapidly; fog banks and 15-metre-per-second winds are common even in summer months. The site remains open year-round without constructed facilities—no shelters, water sources, or mobile signal coverage exist beyond the parking area. Guided excursions led by geologists provide real-time interpretation of basalt column formation, tephra layering, and magma chamber dynamics that fueled the eruptions. Iceland volcano helicopter tour price tours typically include geological briefings and safety equipment tailored to volcanic terrain conditions.
6 hr
