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Inside the Volcano: Small Group Thrihnukagigur Hike and Tour from Reykjavik

Reykjavík, Iceland
Book online or call: (888) 651-9785(888) 651-9785

From US$401.85

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5 to 6 hours (Approx.)
Hotel pickup offered
Mobile ticket
Offered in: English


Make an adventurous descent inside the remains of Iceland’s dormant Thrihnukagigur volcano during this 5-hour, small-group excursion from Reykjavik. Traverse the surreal landscapes of Iceland’s countryside on your way to the Blue Mountains, hiking through the area’s craggy lava fields. Then follow your guide inside the geological site's immense subterranean interior, its walls still scalded from an eruption that took place 4,000 years ago. This small-group excursion, limited to 18 guests, also includes all necessary safety equipment and round-trip hotel transportation.
  • 5-hour Thrihnukagigur volcano tour from Reyjavik, led by a professional expert guide
  • Travel to the Blue Mountains to descend into the dormant volcano
  • Ride an open elevator down inside Thrihnukagigur's magma chamber
  • Walk around the subterranean arena and ogle its scalded walls and dome
  • Learn about the volcano’s last eruption, 4,000 years ago
  • Walk through scenic lava fields to and from the volcanic crater
  • Receive personalized attention on a small-group tour limited to 18 people

Why Travelers Choose This Tour

Unlike other similar tours, hotel pickup/drop-off is standard, making this a hassle-free adventure from start to finish.
Add a dose of adventure to your Iceland visit during this small-group exploration inside the now-extinct Thrihnukagigur volcano. Outdoor lovers:  enjoy this thrilling chance to climb inside a cavern formed thousands of years ago by the powerful forces of mother nature.
Begin with pickup from your hotel in Reykjavik. Then take off for a drive to Iceland’s Blue Mountains for your volcano experience, listening to an introduction on how this unique volcanic site was first formed 4,000 years ago from your guide. As it turns out, the unique eruption allowed the formation of its magnificent magmatic chamber.
After 30 minutes of driving you’ll arrive at Thrihnukagigur, taking note of the safety briefing from your guide. Then head out into the craggy formations of the volcano’s surrounding lava field. Your walk is of moderate difficulty due to the uneven ground and sharp rocky surface, so please be sure to be in good shape and to bring along good hiking shoes.
Continue your hike through the field for 2 miles (3km), taking time to admire its volcanic cones and steaming gas fissures, before arriving at the rim of the crater. Listen to another short safety lesson while donning your helmet and harness, then join a group of three or four other guests on the open cable elevator that will lower you into the site.
Enjoy the incredible views as you descend, observing the crater’s walls formed many thousands of years ago. Soon you’ll reach the base of this dormant volcano and continue on an exploration of the cavernous interior with your guide. Check out the towering rock dome above, the surface scattered with an array of colors caused by the magma that once touched its surface. You’ll also hear a variety of stories from your guide about the last eruption, imagining this incredible site as it once was, bubbling with liquid magma.
After spending around 30 minutes in the crater, return back to your vehicle, which will drop you at your Reykjavik hotel.

Traveler Photos


58 Reviews
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Reviews by Viator travelers
Inside the volcano
, Nov 2018
Excellent trip. Very surreal to be inside a volcano looking up! The hike there took about an hour I guess. The lift down and up was brilliant. It felt safe and the views were fantastic. The guides were superb and knowledgeable. The equipment was all in good order. Great soup at base amp too!We’ll organised and delivered trip. My wife , son and I loved it!Thank you.
A truly unique experience - I dont know...
Richard Goody
, Sep 2018
A truly unique experience - I dont know of anywhere else in the world where you can do this. Why would you miss out?! Tour consists of a drive out to a hut at the foot of the ski slopes where you are offered an extra waterproof layer before your 3km hike across the lava field to the base camp at the base of the crater cone. Here you are offered refreshment, given instruction, split into groups of 6 and given helmet and harness before being escorted up the crater wall to the lift at the shaft opening. Enjoy the ride! 30 mins is spent at the bottom before your return trip. You are told about the history of the volcano and its formation with some explanation of the features that you see around you. It is truly impressive. Back at base camp you are offered a warming bowl of soup before your hike back to the ski slopes and back to Reykjavik. The trip is organised professionally, you are kept well informed, given clear instructions and I felt safe at all times.
An Experience To Remember
Lisa B
, Aug 2018
it's not everyday you get the chance to hike a couple of miles to the cone of a volcano, and then get harnessed and lowered 450 feet into the magma chamber. This was a truly memorable experience, a little physically challenging (i.e. uphill, breathing hard), but well worth the effort. The crew at base camp were super friendly and served a delicious lamb stew, outfitted us with top notch gear and basically keep us safe. We had a beautiful sunny day for the hike! I'd highly recommend this excursion to anyone looking for something different, a little physical and a lot of fun.
It's quite a hike to get to the...
, Jan 2018
It's quite a hike to get to the Volcano, but well worth it.
H o l y. C O.W !!!! If you go...
, Nov 2017
H o l y. C O.W !!!! If you go.... You MUST do this! Amazing, speechless, stunning! To be lowered into a volcano.. u g h. !!! Yes please!!!! Wow!!! There was a short and easy 2 mile hike to get there and then some warm soup to toast you up!! This is Only Open certain times!! Well worth it!!!
Absolutely amazing. I was so...
, Oct 2017
Absolutely amazing. I was so excited for this excursion and it did not disappoint. I was always interested in rocks and volcanos as a child, so this was very special to me. The guides were excellent and safety was the top priority. The soup at base camp when we got out of the volcano was delicious
This is definitely a once in a...
Daria D
, Sep 2017
This is definitely a once in a lifetime experience! My boyfriend and I went on this excursion in mid-August. Our tour guides were Harpa and Nina. Nina joined us down in the volcano. She shared information about the volcano and was more than willing to take countless pictures for everyone in our group using our own phones/cameras! Our group consisted of 7 people. After being picked up from our pick up location in the morning, we then transferred to another van. It was approximately a 30 minute drive to the destination. There we were able to use the restrooms and get some water before starting our 2 mile hike. The hike takes approximately 45 minutes to complete and was not too bad, there was a pathway to walk along. Once we reached the volcano, there was a house next to it. There we were again able to use the restrooms and have water, tea, and coffee. We were able to leave any bags we had with us in the house so we did not have to carry them with us into the volcano. After putting on the harnesses and helmets we were ready to descend into the volcano! Being inside the volcano was truly an amazing and memorable experience. Looking back at the pictures we took, it is hard to believe they are even real and that we were there! We got to spend about 40 minutes inside the volcano, walking around and taking pictures. Afterward, we went back into the house and had some soup. We did not get any sweets, but it is mentioned in the tour description that it is not a definite. There are also souvenirs available for purchase here. The prices are very reasonable, as compared to everything else being super expensive in Iceland. We bought two souvenir shirts which came out to be approximately 20 USD each. They also had other clothing items such as hats and fleeces as well as chocolate bars and books about the volcano. During our hike back our guides stopped at a small cave and let us quickly go inside and take some pictures.
This is fantastic tour and once in...
, Aug 2017
This is fantastic tour and once in the life time we get this kind of opportunities. Those who visit Iceland must try this as well.
It is a unique experience with...
Nelson M
, Jul 2017
It is a unique experience with knowledgeable guides. However, the trek to the volcano is over a very rocky terrain, and being in Iceland, it rained. The interior of the volcano is strewn with rock and boulders and not well lit for exploration.
This was an excellent experience...
Graham R C
, Jul 2017
This was an excellent experience, unforgettable. The majestic colors of the magma chamber are like no others. The walk to the volcano was extremely long and the pace was quite brisk. Not fun :-. The equipment harness, bandana, helmet was appropriate. The safety of the workers was exceptional. The soup that we enjoyed after our 30 minutes in the volcano, homemade by the guides, was amazing - delicious and hot.

Product code: 2970AH131

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