Day 2: Vesturdalur- Ásbyrgi
Day 2 comprises 14 km (8.5 miles) with 100m (330ft) ascent and 150 m (490ft) descent. The walk map is here.
This section has a fascinating history: “Eight thousand years ago, a volcano erupted directly underneath the river and glacial ice. This caused explosions and chaotic flooding which formed the canyons and the fascinating volcanic formations found in the area.”
Bjorn S Harðarson explains: “Hljóðaklettar are elongated volcanic plugs arranged in the dominant fault trend of the area. Through time the Jökulsá river has removed the scoria from the craters leaving the crystalline rock pillars behind. They are part of a crater row which extends for about 3 km along the river. At the northern half, the craters are preserved, although somewhat eroded by the pounding of the river and overrun by a glacier from the east. Columnar basalt characterizes Hljóðaklettar, being arranged in tiers of irregularly curved formations.”
After our nine day hike in the Icelandic central highlands, I didn’t think it was possible to see as much variety in a short distance… but we were proven wrong by the Jökulsárhlaup.