Geothermal Day Hike Through the Hengill Volcano Valley
A guided journey into Iceland's living, breathing geothermal landscape near Reykjadalur and Hengill Volcano
This geothermal day hike Iceland takes you deep into a lush volcanic valley where bubbling hot springs, steaming fumaroles, and ancient sheep trails combine into a 7-hour moderate hiking adventure unlike anything else in the North Atlantic.
The trail winds through a valley shaped by millennia of volcanic activity, following an old sheep path that stays largely away from the crowds. Hikers pass through fields of vivid green moss and wildflowers before reaching thermal rivers and panoramic viewpoints where, on clear days, Þingvallavatn Lake and the Atlantic Ocean come into view.
A standout moment on the route is the signature snack break, where eggs are boiled directly in a geothermal hot spring and served on homemade rye bread baked using geothermal heat, alongside butter and freshly smoked trout. This culinary tradition connects visitors directly to Iceland's relationship with its volcanic landscape.
The tour runs from late spring through early autumn, when the valley's plant life is at its most abundant and daylight hours allow for a relaxed, unhurried pace through the terrain.
Tour Highlights
Walk past bubbling hot springs, colorful fumaroles, and active steam vents that reveal the volcanic forces beneath the valley floor.
Reach the thermal river in Reykjadalur, where an optional soak in warm natural waters provides a memorable mid-hike rest point.
Panoramic views from the day's highest point may extend to Þingvallavatn Lake and the Atlantic Ocean on clear weather days.
Experience the signature geothermal snack break: eggs cooked in a hot spring, served on rye bread with smoked trout and butter.
The geothermal heat sustains a surprising variety of mosses, grasses, and wildflowers that create a verdant contrast against blackened lava fields.
Ravens and arctic terns are frequently spotted soaring above the valley, adding a dynamic wildlife dimension to the hike.
The route follows a quiet old sheep trail that avoids the heavily trafficked paths, offering a more solitary encounter with Iceland's interior.
How the Day Unfolds
The group assembles at the meeting point near the Hengill Volcano area. The guide provides an introduction to the region's geology, volcanic history, and what to expect on the trail ahead.
Hiking begins along the old sheep trail, passing through fields of moss and lush vegetation. The first fumaroles and steam vents appear, and the guide explains their formation and ongoing activity.
The trail reaches the thermal river at Reykjadalur, offering hikers an optional opportunity to wade or soak in the naturally warm water. This is a natural rest point before continuing upward.
The group pauses at a steaming geothermal spring where eggs are lowered into the bubbling water and cooked on site. They are served on homemade rye bread with butter and smoked wild trout while the guide shares stories of local geothermal culture.
The trail climbs to its highest point, where the full scope of the valley and surrounding volcanic landscape opens up. On clear days, distant views of Þingvallavatn Lake and the Atlantic Ocean are visible.
The loop trail descends back through the valley, completing the circuit. The guide offers a final summary of the day's geological and cultural highlights before the group returns to the trailhead.
What Is Included
Included
- Guided hiking tour with a knowledgeable local guide
- Access to geothermal hot springs along the route
- Homemade rye bread with butter
- Eggs boiled on-site in a geothermal spring
- Freshly smoked wild-caught trout
- Information on Icelandic geology, volcanism, and geothermal energy
- Scenic photography opportunities throughout the hike
Not Included
- Transportation to and from the trailhead
- Personal travel insurance
- Hiking equipment or footwear
- Gratuities for the guide
- Any meals or beverages beyond the included snack break
Important Information
Participants should wear comfortable, sturdy footwear suitable for uneven terrain. The trail follows an old sheep path and requires a moderate level of physical fitness. Weather in Iceland can change rapidly, so layered clothing and a waterproof outer layer are strongly advised.
Reserve Your Spot on the Hengill Valley Hike
Places on this small-group geothermal hike are limited. Secure your booking early, particularly for summer departures when demand is highest.
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