Fagradalsfjall's eruption cycle began in March 2021, ending 900 years of volcanic dormancy on the Reykjanes Peninsula. Lava fountains reached 460 metres, spilling molten basalt across Geldingadalir valley at temperatures exceeding 1,200 degrees Celsius.
The site ceased active eruption in September 2021, leaving behind a textured landscape of cooling lava fields, solidified rivers, and volcanic craters accessible to the public.
The Reykjanes Peninsula sits atop the Mid-Atlantic Ridge, where the Eurasian and North American tectonic plates diverge at a rate of 2.5 centimetres annually. Fagradalsfjall's eruption provided scientists with rare access to effusive volcanic activity, drawing geologists from 34 countries to study magma composition, gas emissions, and fissure formation in real time. The resulting lava field covers approximately 4.8 square kilometres, with some sections still radiating residual heat detectable through thermal imaging.
Iceland volcano tours from reykjavik depart daily, transporting visitors 45 kilometres southwest to trailheads near Grindavík. Designated parking areas serve three primary hiking routes: Trail A spans 7 kilometres round-trip with 340 metres of elevation gain, reaching elevated viewpoints over the main crater. Trail B follows a shorter 5-kilometre path across older lava formations. Trail C, opened in 2023, provides barrier-free access to the valley floor. Volcanic terrain remains unstable in sections, requiring sturdy footwear and attention to marked pathways.
Geological monitoring continues through seismic stations positioned across the peninsula. The Icelandic Meteorological Office records subsurface magma movement, with recent data indicating renewed activity beneath Fagradalsfjall and neighbouring Litli-Hrútur, which erupted briefly in July 2023. These eruptions represent the initial phase of a volcanic cycle expected to persist for centuries, transforming the Reykjanes landscape through successive lava flows. Fagradalsfjall volcano hikes now operate year-round, adapting to seasonal daylight and weather conditions that shift dramatically between June's midnight sun and December's abbreviated winter light.
4 hr
