Krafla: Fire in the Mývatn Landscape

Rising 818 metres above the volcanic plains of northeastern Iceland, Krafla stands as one of the country's most accessible and scientifically significant volcanic systems. This sprawling caldera, stretching 10 kilometres across, has shaped the extraordinary landscape around Lake Mývatn for millennia, creating a geological wonderland that draws visitors from across the globe to witness the raw power of Icelandic volcanism.

The Krafla volcanic system extends far beyond its central caldera, encompassing a 100-kilometre-long fissure zone that runs northeast to southwest through the heart of the Mid-Atlantic Ridge. This positioning makes Krafla a textbook example of Iceland's unique geological setting, where the Eurasian and North American tectonic plates slowly drift apart at a rate of 2 centimetres per year.

The Krafla Fires: Iceland's Modern Volcanic Spectacle

Between 1975 and 1984, Krafla erupted in a series of spectacular volcanic episodes known as the Krafla Fires. This wasn't a single, catastrophic eruption but rather a prolonged period of volcanic unrest comprising nine distinct eruption episodes. The fires began on 20 December 1975, when a 3-kilometre-long fissure opened north of the main crater, producing fountains of lava that reached heights of 80 metres.

The most dramatic episode occurred in September 1977, when a new fissure system opened along the Leirhnjúkur ridge. Visitors today can walk across these relatively fresh lava flows, still warm beneath the surface decades later. The volcanic activity wasn't confined to spectacular eruptions; between active phases, the caldera floor rose and fell by up to 2.5 metres as magma moved through underground chambers.

Scientists monitoring the Krafla Fires documented over 20 significant inflation-deflation cycles, providing unprecedented insights into volcanic processes. This research established Krafla as one of the world's most studied volcanic systems, with monitoring equipment still recording every tremor and ground movement today.

Exploring Krafla's Volcanic Landscape

Leirhnjúkur: Walking on Fresh Lava

The Leirhnjúkur area, just 7 kilometres from the Krafla power station, offers visitors the extraordinary experience of walking across lava flows created during the 1975-1984 eruptions. The well-marked trail begins at a car park (GPS: 65.7131°N, 16.7286°W) and follows a 2.8-kilometre loop through this lunar landscape.

The path winds between steaming fumaroles and bubbling mud pools, where ground temperatures reach 100°C just centimetres below the surface. Bright yellow and orange sulphur deposits coat the rocks, creating an otherworldly palette against the black basalt. The trail is suitable for most fitness levels, though proper hiking boots are essential—the sharp volcanic glass can easily damage inappropriate footwear.

Safety barriers mark areas where the ground remains dangerously hot, but the designated path is secure year-round. Winter visits offer the surreal experience of snow-covered lava fields punctuated by steam vents that never freeze.

Víti Crater: The Explosive Past

The Víti explosion crater, formed during an 1875 eruption, presents a dramatically different face of Krafla's volcanic activity. This perfectly circular crater, measuring 320 metres across and 20 metres deep, contains a stunning turquoise lake heated by underground geothermal activity to a constant 25-28°C.

The crater formed when rising magma encountered groundwater, creating a phreatomagmatic explosion that blasted out millions of tonnes of rock and debris. Today, the crater rim provides panoramic views across the entire Krafla caldera system and the Mývatn district beyond. The 1.2-kilometre walk from the main car park to Víti crater is gentle and suitable for all ages.

The Krafla Power Station: Harnessing Volcanic Energy

Iceland's relationship with its volcanic landscape extends beyond tourism and scientific research. The Krafla Geothermal Power Station, commissioned in 1977 and expanded in 1997, generates 60 megawatts of electricity by tapping directly into the volcanic system's heat. The facility operates 19 production wells, some drilled to depths of 2,200 metres, where temperatures exceed 300°C.

The power station's visitor centre (open June-August, 9:00-17:00, entrance 1,500 ISK/€10/£9) provides fascinating insights into geothermal energy production. Interactive exhibits explain how superheated water and steam from Krafla's magma chamber powers turbines that supply electricity to 30,000 homes across northeastern Iceland.

During the Krafla Fires, the power station faced unique challenges as volcanic activity directly impacted operations. Engineers documented how some wells actually became hotter during eruptions, while others were affected by ground deformation. This real-world testing ground has made Krafla technology applicable to geothermal projects worldwide.

Planning Your Visit to Krafla

Getting There

Krafla lies 50 kilometres northeast of Akureyri via Route 1 and the well-maintained Route 863. The journey takes 45 minutes from Akureyri or 15 minutes from Reykjahlíð village on Lake Mývatn's northern shore. All roads to Krafla are paved and accessible to standard vehicles year-round, though winter driving requires appropriate tyres and caution for icy conditions.

Public transport options are limited; the Strætó bus service 641 operates between Akureyri and Mývatn (1,540 ISK/€10/£9 single journey) but requires onward transport to reach Krafla itself. Most visitors either rent vehicles or join organised tours from Akureyri (from 12,000 ISK/€80/£70 per person).

Best Time to Experience Krafla

Summer months (June-August) offer the most comfortable hiking conditions and longest daylight hours, with temperatures ranging from 8-15°C. The midnight sun period provides extraordinary lighting for photography, particularly during late evening when crowds dissipate.

Winter visits reveal Krafla's dramatic contrast between fire and ice. Snow highlights the volcanic landscape's contours, whilst steam from geothermal areas creates ethereal effects in sub-zero temperatures. However, daylight is limited to 4-5 hours in December and January.

Spring and autumn provide excellent middle ground—fewer crowds, reasonable weather, and the possibility of northern lights over the volcanic landscape during clear nights.

Safety and Practical Considerations

Krafla's geothermal features present genuine hazards. Ground temperatures around fumaroles can exceed boiling point, and apparently solid surfaces may conceal superheated mud or steam vents. Always remain on marked paths and observe all warning signs and barriers.

Weather can change rapidly; waterproof clothing and warm layers are essential regardless of season. The volcanic terrain offers little shelter from wind, and exposed ridges can be particularly harsh during storms.

Emergency services are based in Húsavík (35 kilometres) and Akureyri (50 kilometres). Mobile phone coverage is generally reliable throughout the Krafla area, but inform someone of your planned route and timing, particularly for winter visits.

Krafla represents Iceland's volcanic forces at their most accessible and comprehensible. Here, recent eruptions provide tangible connection to the geological processes that continue shaping this remarkable island, offering visitors an unparalleled opportunity to witness—and walk upon—the very foundations of Iceland itself.

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