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Þríhnúkagígur

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Þríhnúkagígur

About

Þríhnúkagígur is a dormant volcano in the volcanic system of Brennisteinsfjöll near Reykjavík, Iceland. Covering a 3,270 square metres (35,200 sq ft) area and a depth of 213 meters (699 ft), it has not erupted in the past 4000 years.

The landscape around volcanic areas looks otherworldly. Black rock, steam vents, the smell of sulfur. Another planet.

Covering a 3,270 square metres (35,200 sq ft) area and a depth of 213 meters (699 ft), it has not erupted in the past 4000 years. It was discovered in 1974 by cave explorer Árni B. Stefánsson, and opened for tourism in 2012.

The terrain can be sharp and uneven. Good hiking boots aren't optional, they're essential.

Driving conditions
Road conditions
Check live· From Reykjavík to the foss
Drive: Good·Visit now·30 min stop
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Prices
Cost to visit
Free
No fees
Entry: Free
Parking: Free
No booking
Entry feeFree
ParkingFree
BookingNot needed
Getting thereCar recommended
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Daily conditions for your trip

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Nearby

Tours

#1.Glacier & Golden Circle
10 hours·Pickup Reykjavík

Snowmobile across a glacier, then hit the Golden Circle classics.

from 32,990 krView tour →
1 tours near Reykjavík Area

Frequently
asked
questions

Is it safe to visit Þríhnúkagígur?
Þríhnúkagígur is not currently erupting, and the surrounding area is generally safe to visit on marked trails. Volcanic and geothermal ground can still be unstable or hide gas — stay on the path, and check safetravel.is for any local closures before you drive.
How do I get to Þríhnúkagígur?
Þríhnúkagígur is in Reykjavík Area. Check live road conditions on this page before you drive — highland access often needs a 4×4 and some routes only open in summer.
Can I hike Þríhnúkagígur?
It depends on the volcano and current activity. Some Icelandic cones have short marked trails to the rim; others sit under glaciers or in closed areas and cannot be climbed without a guide. Never approach an active eruption unless the official viewing area is open — conditions change fast.
What should I know about volcanic gas near Þríhnúkagígur?
Volcanic and geothermal areas can release sulphur dioxide and hydrogen sulphide, which are toxic in high concentrations and collect in low-lying spots. Stay on marked paths, leave immediately if you smell strong sulphur or feel unwell, and check the Met Office gas forecasts during any eruption.

Data & sources

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