Crater Type
Scoria
A cinder cone crater formed from ejected volcanic fragments during an eruption roughly 3,400 years ago
Grábrók Crater: Easy Rim Hike in West Iceland
A scoria crater with a staircase to the rim, an easy roadside stop in West Iceland
Location
West Iceland
Near Bifröst, along Route 1
Grábók is a well-preserved scoria crater located alongside Route 1 in West Iceland near the village of Bifröst. Formed approximately 3,400 years ago during a volcanic eruption that also produced the extensive Grábrókarhraun lava field, this cinder cone crater is one of the most accessible volcanic features in Iceland. A wooden staircase with around 300 steps ascends the steep outer wall of the crater, so visitors can reach the rim and look into the hollow interior. From the top, panoramic views stretch across the surrounding lava field, the Hraunfossar area, and the mountains of Borgarfjörður. The crater and its surrounding area have been a protected nature reserve since 1962.
Sources and last reviewed
Last reviewed: 2026-03-03
Use the staircase to ascend the crater. The loose scoria slopes can be unstable off the marked path. The staircase may be slippery when wet or icy.
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Official sources to check
Access
Staircase
A wooden staircase with approximately 300 steps leads directly to the crater rim
Route
Near Route 1
Located right along Iceland's main Ring Road, a convenient stop for passing travelers
What to Expect
Wooden Staircase Ascent
The well-built wooden staircase makes the steep crater accessible to most visitors, winding up the outer wall with resting platforms along the way.
Panoramic Rim Views
From the crater rim you can see across the Grábrókarhraun lava field, the Borgarfjörður valley, and the surrounding West Iceland mountains.
Crater Interior
Peer into the hollow bowl-shaped interior of the crater, lined with dark red and black scoria deposits from the original eruption.
Lava Field Nature Trail
A short loop trail near the parking area winds through the moss-covered Grábrókarhraun lava field, passing birch scrub and interesting lava formations.
Protected Nature Reserve
The area has been a protected nature reserve since 1962, preserving the volcanic landscape and the birch woodland that has colonized the lava field.
Quick Roadside Stop
The entire visit takes only 30-45 minutes, a practical break when driving between Reykjavík and the north along Route 1.
Getting There
Grábók is located directly along Route 1 (Ring Road) in West Iceland, approximately 100 km north of Reykjavík and near the small university village of Bifröst. From Reykjavík, drive north on Route 1 through the Hvalfjörður tunnel (or around the fjord) and continue through Borgarfjörður. The crater is signposted on the right side of the road with a small parking area at its base. From Akureyri heading south on Route 1, the crater is approximately 250 km. The parking area is accessible to all vehicles year-round.
Best Time to Visit
Grábók is accessible year-round, though conditions are most pleasant from May through October. Summer brings green surroundings, wildflowers in the lava field, and reliable weather for the climb. Autumn brings warm colors to the birch scrub around the crater. In winter, the staircase can be icy and the crater may be dusted with snow; take care on the steps. The crater is an easy stop on a Ring Road drive in any season, but allow extra time in winter for slippery conditions.
Planning help
Grábók Crater FAQs
Quick answers with safety notes where it matters.