One of Iceland's most active volcanoes -- 20+ eruptions since settlement, 30-80 minutes of warning before the next
For centuries, Europeans believed Hekla was literally the entrance to hell. After the catastrophic 1104 eruption -- one of the largest in Icelandic history -- the Cistercian monk Herbert of Clairvaux described it as a prison for the souls of the damned. Medieval maps labeled it "Gateway to Hell." The name stuck in European imagination for nearly 800 years.
The reputation was not entirely superstition. Hekla is one of Iceland's most active volcanoes, having erupted over 20 times since settlement around 874 AD. It is a hybrid between a stratovolcano and a fissure vent, with a 5.5 km active crack along its ridge called Heklugja. When it erupts, it tends to do so explosively at first, then transition to slower lava flows -- a pattern that makes the opening hours particularly dangerous.
What makes Hekla especially concerning for visitors is the warning time. Unlike many volcanoes that show weeks or months of precursor activity, Hekla gives only about 30-80 minutes of seismic warning before erupting. GPS measurements suggest the magma chambers are refilling, and it has now been 26 years since the last eruption -- the longest quiet period in its recent pattern of roughly decadal eruptions (1970, 1980, 1991, 2000).
Hekla gives only 30-80 minutes of seismic warning before erupting. Check vedur.is before any visit. The summit hike is not officially recommended by Icelandic authorities.
On clear days, Hekla's snow-capped ridge is visible from much of South Iceland, including parts of the Golden Circle. The Leirubakki Visitor Center on Route 26 offers interpretation and a good vantage point without any highland driving.
The lower slopes are accessible via gravel roads off Route 26. No F-road required to reach viewpoints and the trailhead area. The volcanic landscape -- lava fields, tephra, and ash -- gives a sense of the volcano's recent activity.
The hike to Hekla's 1,491 m summit takes 7-10 hours round trip, gaining roughly 1,000 m of elevation. Unmarked trail, loose scree, snow fields even in summer. Icelandic authorities do not officially recommend this hike because of the minimal eruption warning time. If you go, register at safetravel.is.
Some operators run snowmobile excursions on Hekla's flanks during winter months, offering a different way to experience the volcano without the summit risk.
1.5-2 hours, no 4WD needed
Take Route 1 east, then Route 26 toward Landmannalaugar. Hekla's base area is about 1.5-2 hours from Reykjavik on paved and good gravel roads. No 4WD required for the main viewpoints and visitor center.
En route via F208 or F225
Hekla is visible and accessible as a stop en route to or from Landmannalaugar via the highland roads. A natural combination for a highlands itinerary.
Day tours and super jeep trips
Several operators include Hekla as part of South Iceland or highlands day tours. Super jeep tours offer access to higher slopes for those who want to get closer without the summit commitment.
June through September for hiking and driving access. The lower slopes and visitor center are accessible throughout this period.
July or August is best for the summit hike when snow cover is lowest, though patches remain year-round.
Winter offers snowmobile tours and dramatic snow-covered views of the volcano from Route 26.
An eruption could happen at any time with only 30-80 minutes of warning. Check vedur.is before any visit, register at safetravel.is, keep your phone charged and alerts enabled, and think carefully about whether a summit hike is worth the risk.
The 1104 eruption (VEI 5) devastated farms across South Iceland. The 1947 eruption lasted 13 months. The 2000 eruption opened a fissure along the ridge in February with almost no warning. Understanding this history adds depth to the visit.
Worth a stop even if you are just passing through on Route 26. It provides context on the volcano's geology, eruption history, and the monitoring systems keeping watch.
The Icelandic Meteorological Office introduced a new four-tier Volcanic Alert Level System for Hekla. The system provides structured guidance on readiness levels for civil protection and visitors alike.
About 70 km further east via highland roads -- colorful rhyolite mountains, hot springs, and the Laugavegur trailhead.
The Valley of Tears -- accessible via F208 continuing past Hekla. A canyon with dozens of waterfalls pouring from its walls.
Gullfoss and Geysir are roughly 60 km north. Hekla makes a natural extension to a Golden Circle day trip.
A beautiful twin waterfall off Route 32, an easy detour en route to Hekla from Reykjavik.
Planning help
Quick answers with safety notes where it matters.