Thrihnukagigur Tour from Reykjavik: Transfer or Self-Drive

• Top choice Thrihnukagigur Volcano Day Trip from US$432 Duration4 - 6 hours^[3]Rating4.85 from 630 reviews^[3]Guide languageEnglish, Icelandic^[3]CancellationFree up to 24 hours in advance^[3] Check availability
• Raufarhólshellir Lava Tunnel from US$153 Duration3 hours^[7]Rating4.59 from 850 reviews^[7]Guide languageEnglish^[7]CancellationFree up to 24 hours in advance^[7] See this tour
• Reykjanes Volcano Eruption Tour from US$132 Duration9 hours^[8]Rating4.65 from 1,154 reviews^[8]Guide languageEnglish^[8]CancellationFree up to 24 hours in advance^[8] See this tour

A day inside a sleeping volcano

Thrihnukagigur is not the Iceland you see from a coach window. It is a real volcano crater, about 4,500 years since its last eruption, and this guided hiking day trip from Reykjavik takes you all the way down into the emptied magma chamber.^[2] You get picked up in the capital, ride out to the mountains, hike across lava, and then descend on an open lift into a vast, silent, colour-streaked hall. It is strange, beautiful and unlike almost anything else you can book in Iceland. The sense of crossing from ordinary countryside into a geological wonder builds slowly, and then the ground beneath your feet changes to rough, dark rock that crunches with every step. Even before you reach the crater, you know you are somewhere special. The air smells clean and cold, and the views over the Blue Mountains stretch out in every direction.

The reason the chamber is empty is believed to be a deep underground rift that drained the molten rock away after the eruption, leaving behind the hollow cavity you visit today.^[10] That is why you can stand on the floor of a volcano and look up at the opening above. The walls glow with mineral deposits left by that ancient eruption, and the scale only becomes clear once you are standing on the bottom.^[11] It is a quiet, almost cathedral-like space, and the play of light on the rock changes as you move across the floor. For many travellers, this is the moment the day becomes truly unforgettable.

How the guided tour works

The tour listing is a guided hiking day trip with pickup options from Reykjavik and 28 drop-off locations at the end.^[3] A live guide leads the trip in English and Icelandic, and the full experience lasts between 4 and 6 hours depending on pickup and group timing.^[3] You travel by coach to the Bláfjöll area, where the meeting point is at a ski cabin in the Blue Mountains, about a 30-minute drive from Reykjavik on paved road.^[5] Along the way, the landscape shifts from city streets to open moorland, and then to the bare, rocky foothills that surround the volcano. It is a short enough drive that you can relax and save your energy for the walk ahead.

From there, the adventure becomes a walk. The route to the crater is about 3 km (2 miles) each way, and with a guide it usually takes around 45 minutes.^[4] You cross old lava fields with views of moss, rock and distant peaks. The path is relatively easy, but you are walking on volcanic terrain, so sensible footwear and a decent level of fitness make the day far more enjoyable. The hike is an essential part of the tour, and in fact it is one of only two ways to reach the volcano base; the other is by helicopter.^[4] Take your time, listen to the guide, and look back every so often. The route rewards those who pause, with ever-changing views of the mountains and the distant sea.

An open lift carries you down into the glowing rock of Thrihnukagigur

The descent into the magma chamber

At the crater, you are fitted with a harness and helmet before stepping onto the open lift. The descent drops 120 meters (400 feet) into the volcano, and the ride itself takes about 6 minutes.^[1] Above you, the crater opening shrinks to a bright circle; below you, the chamber floor slowly comes into focus. The entrance at the top of the cone is only about 4 x 4 m wide, but the space opens out dramatically into a bottle-shaped vault around 120 m deep, with a bottom floor measuring 50 x 70 m.^[2] As you sink into the earth, the temperature changes and the sounds of the surface fade away. The harness keeps you secure, but the open sides of the lift mean you feel every metre of the journey. It is thrilling in a calm, controlled way, and the guides make sure everyone feels comfortable.

Once you are down, you have time to wander and look closely at the rock. Visitors normally spend about 35 to 45 minutes inside the volcano, including the descent, around 30 minutes on the ground floor, and the ascent back up.^[6] It is a raw, open space, not a polished attraction. The colours on the walls come from minerals left by the last eruption, and the quiet inside is a striking contrast to the wind and weather above.^[11] You can walk from one side of the chamber to the other, touch the rock, and simply stand still and listen. The floor is uneven and rocky in places, so watch your footing, but there is plenty of room to explore at your own pace.

What is included and how to book

This tour from Reykjavik is priced from US$432, and it is one of the highest-rated volcano experiences on GetYourGuide, with 4.85 from 630 reviews.^[3] The listing includes pickup options, a live English and Icelandic guide, and 28 drop-off locations at the end of the day.^[3] You can reserve now and pay later, and free cancellation is available up to 24 hours in advance for a full refund.^[3] That flexibility is especially useful if you are still shaping the rest of your Iceland itinerary. The booking process is straightforward, and the availability calendar shows exactly which start times are open for your preferred date.

The tour operates every year from May 5th to October 30th, so it is a seasonal experience rather than a year-round option.^[4] That makes it a natural centrepiece for a late spring, summer or early autumn trip to Iceland. Because dates and pickup times vary, the availability calendar will show the exact starting times for the day you want to travel.^[3] It is also worth noting that the tour can be weather-dependent, so a little flexibility in your schedule is a good idea. If the forecast looks uncertain, you can always ask the operator about conditions before confirming your plans.

Who will enjoy this trip

The minimum age for the Inside the Volcano tour is 8 years old, which makes it feasible for families with older children who are used to walking.^[6] The hike is not technical, and the guided route keeps the pace steady. You do not need to be an experienced mountaineer, but you should be comfortable on uneven lava paths and happy to spend time outdoors in changeable Icelandic weather. If you are generally active and enjoy walking, you will almost certainly love the day. The combination of a hike, a dramatic lift ride and free time on the chamber floor means there is something engaging at every stage.

If you prefer to skip the walk, a helicopter tour option is available to get to the volcano base.^[9] Most visitors, though, will find that the hike across the lava field is part of the magic. It builds the sense of journey before the descent, and it gives you time to appreciate the landscape around the crater. The reward is stepping into a place that almost no other volcano on Earth lets you enter. For photographers, the contrast between the grey lava, the bright sky and the warm mineral colours underground is endlessly appealing. For everyone else, it is simply an experience you will talk about for years.

How it compares with other lava experiences

Iceland offers several ways to see volcanic rock up close. If you want to explore a lava tunnel instead, Raufarhólshellir is a 1360 m long tunnel formed about 5200 years ago during the Leitahraun eruption, with a main passage of 900 m.^[12] A bus tour from Reykjavik to Raufarhólshellir takes about 3 hours and costs from US$153.^[7] It is a very different experience: underground, narrow, and shaped by flowing lava, whereas Thrihnukagigur is a huge open chamber below a volcanic crater. The tunnel is fascinating in its own way, with smooth walls and a sense of history pressed into every curve, but it does not offer the same jaw-dropping scale as standing inside a volcano.

Another popular option is a hiking tour to the eruption site and Reykjanes area, from US$132 and lasting 9 hours.^[8] That is a surface hike to recent eruption landscapes, with hot springs, cliffs and the bridge between continents along the way.^[8] If your main goal is to stand inside a volcano, Thrihnukagigur is the clear choice. If you want to compare it with tunnels and surface hikes, you can combine it with other lava-focused tours on a longer Iceland trip. Each of the three experiences shows a different side of Iceland's volcanic nature, so choosing between them really comes down to what kind of day you want.

Practical advice for the day

Go prepared for wind, sun and the possibility of rain. The lava field is exposed, and temperatures inside the chamber stay cool, so layers are your friend. Sturdy closed-toe shoes are essential for the walk over lava. Bring a small backpack with water and a snack, and keep your phone or camera handy for the crater views and the chamber floor, though you will be wearing a harness during the descent. A waterproof outer layer is a smart choice even on bright mornings, because conditions in the Icelandic highlands can change in minutes. Sunscreen and sunglasses matter too, especially when the sun reflects off the pale rock and patches of snow.

Because the tour runs seasonally from May 5th to October 30th, it is wise to book early for popular summer dates.^[4] The meeting point in Bláfjöll is about 30 minutes from Reykjavik, and pickup options are available, so you do not need a rental car for this day.^[3][5] After the hike, the coach returns you towards the city with a long list of drop-off points, which makes it easy to end the day near your accommodation.^[3] Leave a little time after the tour before any other plans, just in case the group runs slightly late. And do not be shy about asking your guide questions; they are usually full of stories about the volcano and the surrounding landscape.

How the day unfolds

1. Meet your coach in Reykjavik

   Pickup options are available from the city, and the final drop-off list includes 28 locations around Reykjavik.^[3]

2. Drive to Bláfjöll

   Head to the ski cabin meeting point in the Blue Mountains, about 30 minutes from Reykjavik on paved road.^[5]

3. Hike to the crater

   Walk roughly 3 km each way across the lava field, usually taking about 45 minutes with the guide.^[4]

4. Descend into the chamber

   Take the open lift 120 meters down, a ride of about 6 minutes, into the hollow volcano.^[1]

5. Explore the chamber floor

   Spend around 30 minutes inside, wandering the 50 x 70 m bottom of the vault with your guide nearby.^[2][6]

6. Ride back and return

   Ascend, hike back over the lava, rejoin the coach and finish with one of the 28 drop-off destinations.^[3]

Things travellers ask