Eldborg Crater
Eldborg is a scoria crater in Hnappadalur valley in West Iceland, widely regarded as one of the most perfectly shaped volcanic craters in the country. Its name translates as Fortress of Fire, and rising 60 metres above the surrounding lava field with a near-oval outline 200 metres across, it does look the part. The crater is believed to have been most active between 5,000 and 8,000 years ago and is the largest along a short volcanic rift in the area. A 6-kilometre return hiking trail from Snorrastaðir farm crosses a lava field to reach the crater base, with chains fitted on the steep upper section to assist the final ascent to the rim. From the top, on clear days, views extend from Snæfellsjökull glacier all the way to the Reykjanes Peninsula.
One of Iceland's Most Perfectly Formed Craters, with a Lava Field Trail and Views Across West Iceland
Eldborg sits in Hnappadalur, a green valley in the Mýrar district of West Iceland at the eastern foot of the Snæfellsnes Peninsula. It is part of the Ljósufjöll volcanic system and formed during the Holocene, with the most recent significant eruption believed to have occurred around 5,000 to 8,000 years ago. The crater is a scoria cone, meaning it built up from the ejection of solidified lava fragments around a central vent, and its symmetrical oval form, 200 metres across and 60 metres tall, is unusually well preserved compared to most Icelandic craters of the same age. The Landnámabók, the Book of Settlements, contains an account of a farm that was burned by a lava flow in this area during the Viking age, suggesting some level of volcanic activity in the early settlement period, though the dating is contested.
The hiking trail to the crater begins at the Snorrastaðir farm on Route 54, where there is a small service area with accommodation and basic facilities. From the trailhead, the path covers approximately 3 kilometres one way, crossing a lava field covered in heather, moss, and low shrub. The terrain is uneven throughout, with rocks and lava substrate requiring sturdy footwear with good grip. The trail is well marked but can be muddy after rain. At the base of the crater the slope steepens sharply, and chains are fixed to the rock to help hikers make the final ascent to the rim. The interior of the crater is visible from the top and the coloured layers of lava within are one of the visual highlights of the hike. The round trip takes between one and a half and two hours at an easy pace.
Eldborg is free to visit and open year-round, though conditions can be challenging in winter. From the crater rim on a clear day, the views extend west to the Snæfellsjökull glacier and east across the lava fields toward the Borgarfjörður valley, with the Reykjanes Peninsula visible on the southern horizon in exceptional visibility. The trailhead at Snorrastaðir is reached via Route 54, roughly 13 kilometres east of Borgarnes and about 90 kilometres from Reykjavík, a drive of around an hour and fifteen minutes. Eldborg is a natural inclusion on a Snæfellsnes day circuit, sitting just before the peninsula proper begins heading west.
