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Kerid Crater is a 6,500-year-old volcanic caldera near the Golden Circle route in South Iceland. Its striking red slopes surround a bright aquamarine lake, creating a scene that has earned it the nickname “Blue Eye of Iceland.” Walking along the rim of Kerið feels surreal, with views straight into the volcanic crater and the lake’s vibrant colors below.
Kerið formed when a volcano ran out of magma and collapsed. Photo by Arctic Adventures.
Kerid Crater's history begins with its formation between 3,000 and 6,500 years ago, though the exact age is unclear due to erosion over time. Its relatively young age is unique compared to surrounding geological features. The striking red slopes caused by fresh iron deposits also clearly reflect its youthfulness.
Most scientists believe that Kerið was once a cone-shaped volcano that erupted and exhausted its magma reserve at some point. The hollow foundation fell in on itself, resulting in its current shape. Its bowl-like caldera is large—170 meters (557 ft) wide, 270 meters (885 ft) long, and 55 meters (180 ft) deep. After its collapse, Kerið filled with water, forming a lake at the caldera's center. The lake’s depth ranges from 7 to 14 meters (23 to 46 ft), depending on factors like snowmelt, rainfall, and evaporation.
The water’s bright aquamarine color comes from minerals in the surrounding soil, earning it the nickname "Eye of the World." This site is also called Golden Circle Crater due to its proximity to the famous Icelandic route. The Icelandic name is Kerið, Kerid in English, commonly misspelled as Kerio or Kerio Crater Lake.
Kerid Crater facts:
Exploring the famous crater in January 2025. Photo by Gunnar Gaukur Guthmundsson.
The area around the Kerid Crater in winter experiences typical Southern Iceland weather, with about 109 mm (4.3 in) of precipitation in December and windy conditions due to its large open space. January and February are the coldest months, with lows of -5 °C (23 °F) during the day. From the beginning of November, you’ll be lucky to see a frozen Kerid Crater Iceland lake, usually as temperatures fall to 0 °C (32 °F).
If you visit during the chillier months, you can take a winter hike around the crater, and it’s absolutely worth it. The snow-covered slopes resemble a peaceful white amphitheater, and if you time it right with the evening, Kerið is a spectacular backdrop to witness the Northern Lights. However, you should be careful on the icy steps down to the lake—they can get slippery. Hiking shoes with ice spikes are recommended for a safer walk.
After paying the small entrance fee, visitors of all abilities can enjoy this unique geological wonder. The hike around Kerid Crater is short and easy, covering 1.4 km (0.87 miles) with about 46 meters (150 feet) of elevation change. The route takes roughly 25–30 minutes, depending on how often you stop to admire the views and take photos. In summer, Kerid Crater bursts with vibrant colors, making it especially stunning to explore from every angle.
For a closer look, follow the developed pathways and steps on the red slopes down to the lake’s shore. A bench near the water is a great spot to relax and enjoy the scenery. Overall, exploring both the rim and the lake takes about an hour. If you want to hike around Kerid at night, keep in mind that the crater is open as long as the sun is shining. This means summer nights are ideal for a peaceful visit, while winter walks can be much shorter due to the lack of daylight.
Kerid Crater is located in the Grímsnes area of South Iceland, near the geothermally active Reykjanes Peninsula. You can find it at the address 805 Klausturholar. It’s at the tip of a chain of volcanic hills called Tjarnarhólar, 12 square kilometers (4.6 square miles) large, and the only one with a near-perfect intact oval shape. Fields of trees surround the crater, with scattered houses nearby.
There are no restaurants near Kerid Crater, but the small town of Borg, located 7.4 km (4.59 mi) away along Route 53, has Minniborgir cottages with food and accommodations for travelers. Paved roads link the site to some of Iceland’s top tourist destinations:
The parking lot of Kerið is located near the volcanic crater lake and can be reached by Route 35 in South Iceland. The space is plentiful, with many parking spots, and just a few minutes walk from the entrance. Parking here is free, with only a charge for a ticket to the crater itself. Expect a lot of traffic during summer days and barely any cars in winter.
Kerið is easy to reach, located just off the Ring Road. Photo by Arctic Adventures.
Kerid is close to the Golden Circle attractions of Thingvellir, Geysir, and Gullfoss and is connected to them by Routes 35, 36, and 37. The classic Golden Circle tour with Kerid Crater is a popular choice, as the crater's vibrant colors make the short detour well worth it. However, you can go the extra mile and add some nearby geothermal pools to this popular itinerary. For example, the combination of the Golden Circle, Blue Lagoon with a ticket, and Kerid Volcanic Crater ends with a warm water finale and contrasting volcanic landscapes.
Alternatively, the Golden Circle full-day tour with Sky Lagoon and Kerid Crater includes a visit to the newly opened Icelandic hot spring and the 7-step SPA ritual. Kerid’s location allows you to explore some of Iceland’s top sights in one day, ticking off must-visit spots like the geothermal pools, the geysers, and the iconic waterfall—all in the same trip!
Thingvellir National Park - a UNESCO World Heritage site with a visible tectonic rift that you can explore by hiking or snorkeling at Silfra Fissure.
Geysir Hot Springs Area - a geothermally active area in the southwest where Strokkur geyser shoots up boiling hot water every 5 to 10 minutes and up to 20 m (66 ft).
Gullfoss Waterfall - a Golden Circle waterfall with a mighty cascade. You’ll hear the roar of the 32 m (105 ft) falls before seeing its dramatic beauty.
Faxi Waterfall - a waterfall fed by Tungufljot River with a 7 m (23 ft) tall and 80 m (260 ft) wide fall with a ladder for salmon to navigate upriver.
Laugarvatn Fontana Spa - a geothermal wellness establishment near Lake Laugarvatn, offers a range of pools and steam baths heated by natural hot springs, with admission fees required for access.
The Secret Lagoon - a hot spring and popular detour for Golden Circle visitors. Icelanders call it Gamla Laugin, translated to "The Old Pool," as it is one of Iceland's oldest warm-water bathing spots.
Friðheimar Tomato Farm - a greenhouse near Reykholt that uses geothermal energy to grow fresh tomatoes year-round for tomato-based dishes.
Flúðir Village - a small town at the heart of Hrunamannahreppur municipality with a population of 800. Famous for the oldest hot spring pool, Secret Lagoon.
Selfoss town - the largest town in South Iceland along the Ölfusá River with a population of 7,000.
Hveragerði - a geothermal village with steaming vents, bubbling mud pools, and greenhouses, the closest settlement to Reykjadalur hot spring Valley.
Kerid is the most famous crater on Iceland’s Golden Circle due to its red slopes, green vegetation, and blue lake in the middle, often called the "Eye of the World." It stands out from other well-known craters in Iceland, such as Askja, Víti in Krafla, and Ljótipollur, as its bowl-shaped form remains intact.
Yes, Kerið Volcanic Crater Lake is worth visiting as a family-friendly and geologically fascinating attraction. There aren’t many places to walk along the edge of a volcanic bowl that was once filled with lava! This destination is also close to the Golden Circle route, making it easy to explore the many things to do near Kerid Crater. Whether you are touring or driving in Iceland, visit Thingvellir National Park, Strokkur Geyser, and Gullfoss.
Kerid Crater is red because the volcanic rocks on the slopes are rich in fresh iron. Since the last eruption 3,000 to 6,500 years ago, the iron has reacted with air, making the sides red. This hints that the crater is much younger than the other formations in the area.
One hour is more than enough to experience the beauty of Kerid Crater. You can hike around the rim for panoramic views of the volcanic scenery or descend the stairs to the lake and surround yourself with green, blue, and red colors.
Kerid is a volcanic crater lake near the Golden Circle route, known for its striking red slopes and vivid blue water. Its vibrant colors create a unique contrast that makes it one of Iceland’s most easily recognizable sights. Scientists estimate it formed 3,000 to 6,500 years ago, making it younger than many of Iceland’s other volcanic craters.
Kerid Crater is located in Iceland’s Southern region in the Grímsnes area, near the Golden Circle route, making it a popular stop for travelers. The crater is about 55 kilometers (34 miles) east of Reykjavík and can be reached via the main Ring Road (Route 1) and then Route 35.
The average visitor completes the walk around the rim in 15 to 30 minutes. Those with slower walking speeds, such as families with children or older adults, may take an additional 10 minutes or more. If you also plan to walk down to the lake, allocate 30 to 45 minutes for the full experience.
Kerid Crater tickets cost 600 ISK (5 USD) and can be bought online or at the attraction’s entrance. This fee helps the landowners preserve and protect the crater and maintain the parking lot. Parking, however, is free and conveniently located next to the crater.
The blue aquamarine color in the Kerid Crater comes from minerals in volcanic rocks that dissolve into the water over time. These minerals interact with sunshine, creating a vivid aquamarine shade. Additionally, since the lake is quite shallow, it reflects more sunlight, making the blue even brighter, especially on clear days.
Kerid is believed to have erupted between 6,500 and 3,000 years ago, but there are no written records of the event. The exact date is debated due to the challenges of studying volcanic sites. However, its fresh iron-rich slopes and relatively intact shape suggest it’s younger than nearby volcanic formations.
No, Kerid Crater Lake swimming is not allowed because it’s a protected natural area. The water is also extremely cold, and there are no lifeguards. Instead, enjoy hiking around the rim or walking along the shoreline to soak in the stunning views, whether you visit in summer or winter.
Kerid Crater Lake fluctuates between 7 and 14 meters (23 and 46 ft), depending on rainfall, snowmelt, and the season. The lake fills part of the 55-meter (180 ft) deep bowl shape, creating a striking and colorful volcanic landscape.
Kerid Crater is about an hour’s drive from Reykjavik. Take Route 1 South, then turn onto Road 35, which leads directly to the crater. If you’re coming from Thingvellir National Park, follow Route 36 and then Road 35 for a 25-minute drive. If you don’t want to rent a car, consider a convenient Golden Circle day trip with Kerid Volcanic Crater from Reykjavik.
The walk from the parking lot to the crater takes only a few minutes. The farthest you’ll have to park your car from the entrance is 100 meters (328 ft).
Reykjavik is about 70 km (43 mi) from Kerid Crater, roughly a 45-minute to 1-hour drive. To get there, take Route 1 (Ring Road) south and then turn onto Road 35 (Biskupstungnabraut). The crater is conveniently located along the Golden Circle route, so you can stop here while visiting nearby attractions like Thingvellir or Geysir.
Yes, you’ll need to pay a 600 ISK (5 USD) entrance fee to visit Kerid Crater. Parking is free, but it might get busy in summer during the peak tourist season. If you join a Golden Circle tour that includes Kerid, entrance fees, and logistics will be taken care of for you.
Kerid Crater, part of Iceland’s active Western Volcanic Zone, is completely inactive. Its last eruption occurred between 6,500 and 3,500 years ago, though scientists still debate the exact timing. No volcanic activity has been recorded since, making it a safe and intriguing destination.
