Inside the Volcano: Small-Group Tour and Lava Field Hike
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September 2026
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Adults
Age 13 and over
Children
Age 12 and under
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Free cancellation up to 24 hours before. Same price on Viator, Outty earns a commission.
Traveler rating
4.7/5
Based on 175 traveler reviews. Ratings and reviews provided by Viator and Tripadvisor.
Quick answer
Is Inside the Volcano: Small-Group Tour and Lava Field Hike worth booking?
Inside the Volcano: Small-Group Tour and Lava Field Hike is a 5-hour experience in Reykjavik, Iceland, from $558 per person. It scores 69 out of 100 on the Outty Ranking, which we label “Solid Choice”, based on a 4.7/5 rating across 175 reviews. Cancellation is free up to 24 hours before the start time. Same-day spots are currently showing.
- Outty Ranking
- 69 / 100
- Rating
- 4.7/5 (175)
- Duration
- 5 hours
- From
- $558 per person
Descend into a dormant volcano on this unique small-group adventure from Reykjavik. Hike across the stunning lava fields of Iceland’s Blue Mountains before lowering into the vast magma chamber of Thrihnukagigur Volcano—l
What you get
About this experience
Descend into a dormant volcano on this unique small-group adventure from Reykjavik. Hike across the stunning lava fields of Iceland’s Blue Mountains before lowering into the vast magma chamber of Thrihnukagigur Volcano—last active over 4,000 years ago. Equipped with safety gear, you’ll explore the only accessible volcano interior in the world, witnessing vividly colored rock formations and a massive underground dome. This once-in-a-lifetime 5-hour experience is limited to 18 guests for a more intimate, guided journey into Iceland’s volcanic heart. Book your Thrihnukagigur Volcano tour for an unforgettable Icelandic adventure.
What travelers are saying
Outty’s summary of the themes that recur across 175 traveler reviews. Written by us, not quoted from reviewers.
The guide
6 mentionsTravelers single out the guide as the reason the experience works.
Physical effort
5 mentionsExpect real walking or climbing: reviewers mention the effort involved.
Knowledge and storytelling
3 mentionsReviewers describe the commentary as informative rather than scripted.
Traveler reviews
175 verified traveler reviews for Inside the Volcano: Small-Group Tour and Lava Field Hike. Ratings and reviews provided by Viator and Tripadvisor.
More strenuous than expected. But amazingly beautiful.
This was an incredible experience, but was a much harder hike than we had expected. I counted 16000 and rather than a flat trail there was a lot of up and downs. The last bit is very steep. If you're in good shape, this should not be a problem. I'm surprised they had no accomodation for anyone with a handicap. They did mention that one woman had hired a helicopter to take her to the volcano.
Response from the operator: Hello, Thank you for sharing your detailed feedback! 🌋 We’re delighted to hear you found the experience incredible, while also appreciating your honest comments about the difficulty of the hike. The trail does involve significant elevation changes and some steep sections, so we understand how challenging it can be, especially if you are expecting a flatter route. We also appreciate your feedback regarding accessibility and the lack of suitable options for guests with limited mobility. We’ll certainly take this into consideration as we continue to improve our communication and services. We hope to welcome you again for another Icelandic adventure! Kind regards, Svava
via Viator
Need to be fairly fit....
I may have missed this detail....it is a 45 minute hike to the Base Camp and back on somewhat uneven ground. VERY INTERESTING. More 'rustic' than cave tours in the States.
Response from the operator: Dear Gene, Thank you so much for your review. We’re delighted to hear that you found the experience so interesting and enjoyed exploring the lava cave. We also appreciate you pointing out the walk to and from the cave. The hike to the entrance is part of the adventure and does involve uneven terrain, so your feedback is helpful for future travellers when preparing for the tour. Thank you again for travelling with us. We hope to welcome you back for another unforgettable adventure in Iceland. Warm regards, Patricia, Customer Service, Reykjavik Excursions by Icelandia
via Viator
inside the volcano
weather was horrendous (cold, windy and rainy), but otherwise an incredible trip. Very unique, a lot of walking in the rain, but otherwise very worthwhile.
Response from the operator: Hello. Thank you for your review! We’re glad to hear that despite the challenging weather, you found the Inside the Volcano experience unique and worthwhile. Icelandic weather can certainly make an adventure more challenging, but we’re happy the experience was still memorable for you. We appreciate you joining us! Kind regards, Sesili
via Tripadvisor
Despite having Pickup issues this was an amazing tour!
Excellent tour, the hike was a good distance which we enjoyed and it was a nice easy hike, the experience inside the volcano was amazing and quite unique. Our tour guide was wonderful and provided knowledge to us about the surrounding area as well as within the volcano. 2 complaints, for over $545, they should have picked us up in a minibus and directly taken us to volcano base camp starting point rather then picking us up in a large bus! The large bus then took us to the bus station where we were transferred to a more personal minibus which took us to the base camp starting point. Secondly, the tour was advertised to start at 8 AM. However, the day before the tour, we get an email telling us we need to be outside our cruise ship at 7:30 AM, for the 10 minute ride to the bus station where we were transferred to the minibus. We arrived at the bus pickup spot at the cruise terminal at 7:45 with 2 other groups and the driver of the large bus was rude to us and told us we were late. Despite his comment, we were in the minibus exactly at 8 AM for the start of the tour. In fact, there is no rush to start exactly at 8 AM, as we were back in town by 1:45 PM for an advertised 6-hour tour. The driver of the minibus did offer to the travelers.to drop people off in town which we took advantage of since we had limited time to see the highlights of Reykjavik.
Response from the operator: ello, Thank you for taking the time to share such detailed feedback! We’re delighted to hear that you enjoyed the hike and found the experience inside the volcano so unique and memorable. It’s wonderful to know that your guide’s knowledge about both the volcano and the surrounding area added to your experience. We also appreciate your comments regarding the pickup process. Our pickup service is designed to collect guests from various locations before bringing everyone to the departure point, where they are transferred to the appropriate vehicle for the tour. We understand that this may not have been what you expected, and we’re sorry for any inconvenience this caused. We’re also sorry to hear about your interaction during the pickup. That is certainly not the level of service we aim to provide, and we appreciate you bringing it to our attention. Your feedback regarding the pickup timing and communication is valuable, and we will share it with our operations team for review. Thank you again for your thoughtful feedback, and we hope to welcome you back to Iceland in the future. Kind regards, Sesili
via Tripadvisor
DO not book. They are the Worst.
DO not use them. Absolutely the worst. They tell you 10 am pickup, and show up before that and leave. They NEVER say anywhere on this description they will be there before the pickup time. They never came or responded to ANY of my messages on the app. No reply, no call, no nothing. I waited from 10 am to 11:30 am and they finally wrote they were there at 9:42 am? Its 10 AM pickup!! I wasted a complete day and have nothing to do now but walk the city by myself because its too late to do anything else. Ive been using Viator for 5 years and have never had this experience before with any operator and I travel all over the world.
Response from the operator: Hello, Thank you for your feedback. We are very sorry to hear about your experience and the frustration caused by the pickup confusion. We understand how disappointing it must have been to miss the tour and will review this situation to improve our communication and pickup process. Best Regards, Gabriele
via Viator
Good to know
- Duration
- 5 hours
- Free cancellation
- Up to 24h before
- Minimum age to book
- All ages
- Availability
- Bookable today
- Booked in 30 days
- 61
- Verdict
- Solid Choice
Why this scores 69
The Outty Ranking is a weighted composite. Here is how this experience performed on each component.
Inside the Volcano: Small-Group Tour and Lava Field Hike: questions travelers ask
Practical detail on this experience, plus the wider planning questions for Reykjavik.
How much does Inside the Volcano: Small-Group Tour and Lava Field Hike cost?
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Prices start at $558 per person. The final price depends on the date, the time slot and the number of travelers, and peak weekends in Reykjavik usually price higher than midweek mornings. Live pricing and remaining availability are confirmed on the booking screen before you pay.
How long does Inside the Volcano: Small-Group Tour and Lava Field Hike take?
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Plan for about 5 hours from start to finish, not counting travel to the meeting point. Most travelers leave another 30 minutes on either side so the rest of the day in Reykjavik is not rushed.
Is Inside the Volcano: Small-Group Tour and Lava Field Hike worth it?
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It holds an Outty Ranking of 69 out of 100, which we label "Solid Choice". That score blends traveler sentiment (4.7/5 across 175 reviews), the depth of that review evidence, recent booking momentum, value for money against comparable last minute in Reykjavik, and how flexible the cancellation terms are.
Can I cancel or reschedule Inside the Volcano: Small-Group Tour and Lava Field Hike?
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Yes. Cancel free up to 24 hours before the start time for a full refund. Inside that window the booking is non-refundable, and no-shows are not refunded.
Is Inside the Volcano: Small-Group Tour and Lava Field Hike suitable for kids and families?
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Yes, all ages are welcome. Families should still weigh the 5-hour running time, and strollers are easier on the earlier, quieter departures.
How far in advance should I book Inside the Volcano: Small-Group Tour and Lava Field Hike?
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Around 61 people booked this in the last 30 days, so popular slots go early. Two to three weeks ahead is comfortable in shoulder season, while summer weekends and holidays in Reykjavik can sell out a month out. Same-day spots do open up when other travelers cancel, so it is worth checking if you are already in town.
What should I bring or wear?
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Bring photo ID, your booking confirmation on your phone, a refillable water bottle and comfortable shoes. Dress for the weather in Reykjavik and add a light layer if any part of the 5-hour experience runs outdoors or after sunset.
Where does Inside the Volcano: Small-Group Tour and Lava Field Hike start and how do I get there?
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The exact meeting point and directions are on your voucher once you book, and they sit in central Reykjavik within reach of public transport. Arrive 15 minutes early: late arrivals are treated as no-shows by most operators.
What are the best things to do in Reykjavik?
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On Outty we rank every Reykjavik experience on the same 0 to 100 scale, and alongside this one the highest scorers right now include Reykjavik Food Walk - Local Foodie Adventure in Iceland, Small-Group Golden Circle, Blue Lagoon with Ticket & Kerid Crater, Reykjavík Small group Walking Tour - by CityWalk. The city page groups everything into most popular, highest reviewed, last minute and family-friendly so you can build a day around what actually delivers.
When is the best time to visit Reykjavik?
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Booking patterns follow the same curve: prices and queues climb in peak weeks, while shoulder season gives you better availability on the top-ranked experiences and more room to change plans.
How many days do you need in Reykjavik?
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Three full days covers the headline sights without sprinting. A workable rhythm is one anchor experience each morning, such as this one, an unhurried afternoon in a single neighborhood, then a food or nightlife booking in the evening. Five days lets you add a day trip outside the city.
Do I book through Outty or through the operator?
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Outty ranks and explains the experiences, then hands you to Viator to complete the booking with the operator directly. The price is the same as booking on Viator yourself, and Outty earns an affiliate commission on the referral, which is how the rankings stay free to read.
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