Canonical URL: https://www.iceland.org/volcanoes/askja Content updated: 2026-09-10 This is the Markdown representation of the page. Interactive tools and forms are available on the [HTML page](). Source-check and review dates retain the meanings stated in the article. --- # Askja Volcano: Highland Caldera & Víti Crater A remote highland caldera with Öskjuvatn, Iceland's deepest lake at 220 meters, and the Víti geothermal crater, surrounded by lava deserts. Updated September 10, 2026 · [Published by Iceland.org]() · [Writing & review]() Region Highlands F-road access only. Open late June–September. ## Quick Answer Deep in Iceland's uninhabited interior, Askja is a massive caldera system that has been a destination for adventurous travelers since NASA astronauts trained here in the 1960s. Dark lava fields stretch in every direction, broken by the deep blue of Öskjuvatn lake and the milky turquoise of the Víti crater. Sources and page update Updated: 2026-09-10 This page is for trip planning, not emergency guidance. Highland roads can close without notice. Check road.is and carry emergency supplies. For sourcing standards and how to report an error, see the editorial policy. Official sources to check - [Weather (IMO)]() - [Road status (road.is)]() - [SafeTravel alerts]() - [Environment Agency of Iceland]() Key feature Öskjuvatn lake (220m deep) Iceland's deepest lake, formed after 1875 eruption. Last eruption 1961 Small eruption. Major eruption was in 1875. Access 4x4 via F-roads F88 and F910. River crossings required. ## What to Expect at Askja - Caldera volcano classification: nested caldera complex ~50 km² within the Dyngjufjoll mountains - Major eruption history: 1875 Plinian eruption (VEI 5) caused mass emigration to North America; last eruption 1961 - Oskjuvatn: Iceland's deepest lake at 220 m, still filling since 1875 caldera collapse; swimming prohibited - Viti geothermal crater: milky-blue warm water (~25°C), formed in 1875 explosive eruption - 45-minute hike from parking area to crater rim across dark tephra and pumice fields - NASA Apollo astronauts trained here in 1965-1967 due to lunar-like basalt landscape - There are no shops, restaurants or gas stations at Askja; arrange provisions before entering the highlands ## Nearby Attractions - [Herðubreið]() (Queen of Mountains) - Drekagil canyon and Dreki hut - Holuhraun lava field (2014–2015) - Herðubreiðarlindir oasis with campsite - Ódáðahraun lava desert (Iceland's largest) - Kverkfjöll ice caves and hot springs ## How to Get There - Take Route 1 to the F88 junction (east of Myvatn) or approach from the east via F910 - F88 requires a capable 4WD vehicle with high clearance; multiple river crossings including Lindaa - F910 from the east also requires 4WD; connects to Askja from the Egilsstadir direction - Total drive from Myvatn: approximately 2.5-3 hours on F88 (100 km of rough highland road) - Guided day tours and multi-day highland tours available from Myvatn and Akureyri in summer - No fuel, food, or services on F88/F910; carry spare fuel, provisions, and emergency equipment ## Best Time to Visit - Late June to early September: F-roads typically open only during this window - July and August: most reliable road conditions and warmest highland weather - F88 opening depends on snowmelt and river levels, so check road.is daily before departure - September: roads may close with first snowfall, sometimes without warning - 24-hour daylight in mid-summer allows flexible timing; evenings often calmer for crater rim walks - Winter: completely inaccessible; roads closed from October through May/June ## Dreki and the crater parking area serve different purposes The [national park’s Askja guide]() places summer rangers at Drekagil and Herðubreiðarlindir, and identifies parking and toilets at Vikraborgir by Askja. The Touring Club of Akureyri handles reservations for its cabins and campsites. Do not treat “Dreki” and “Askja parking” as interchangeable navigation destinations. There are no shops, restaurants or gas stations at Askja. Arrange food, fuel and any overnight booking before the highland drive, and check the specific roads on your route. At Víti, the park warns of slippery slopes, hot mud and falling rocks. Ask the ranger about current conditions before considering a descent; the crater’s reputation as a bathing spot does not settle that decision. ## August 2026: the uplift episode has ended [IMO’s August 14, 2026 fieldwork update]() reports that the uplift which began in 2021 has ceased, with minor subsidence detected. It lowered Askja’s volcanic alert level to 0, representing background conditions. The report still warns that steam explosions can occur in geothermal areas. That is an update to the volcano’s monitoring status, not a statement that Víti is safe for bathing or that highland roads are open. Check park access instructions separately. Planning help ## Askja FAQs Quick answers with safety notes where it matters. **How do you get to Askja?** Askja is accessed via highland F-roads (F88 and F910), requiring a 4x4 vehicle with river-crossing capability. The roads are typically open from late June to September. Guided tours are also available from Mývatn and Akureyri. **Can you swim in the Víti crater at Askja?** Swimming in Víti has been popular historically, but conditions vary. The geothermal water temperature fluctuates, and access can be restricted due to safety concerns including unstable slopes and water quality. Check current conditions before planning. **How deep is Öskjuvatn lake?** At 220 meters, Öskjuvatn is the deepest lake in Iceland. It formed after a massive caldera eruption in 1875 and is still slowly filling. The water is extremely cold and swimming is prohibited. **When is the best time to visit Askja?** July and August are the best months, as highland roads are usually open and weather is most favorable. The F-roads to Askja close with the first snowfall, typically in September or October. **Can you stay overnight at Askja?** There is a basic mountain hut at Dreki, near Askja, operated by the Icelandic Touring Association. It offers bunks and basic facilities. Camping is also possible nearby. Book well in advance for summer. [All volcanoes]() For a countrywide view of Iceland’s volcanic systems, explore our [Iceland statistics]().