Iceland's mountains are shaped by volcanic activity and glacial erosion. The main ranges are:
Runs along the west coast. Highlights: Snæfellsjökull glacier-volcano (Jules Verne's "Journey to the Center of the Earth") and Hvannadalshnúkur (2,110 m / 6,923 ft), Iceland's highest peak, on Öræfajökull.
Vast, uninhabited volcanic plateau. Contains Askja caldera, Hekla volcano, geothermal areas (Landmannalaugar), and the Kjölur and Sprengisandur highland routes.
Rugged terrain with glacial rivers. Key volcanoes: Bárðarbunga (under Vatnajökull) and Kverkfjöll. Gateway to Vatnajökull National Park.
Ancient, deeply eroded mountains with sheer cliffs, deep fjords, and dramatic coastal scenery (Látrabjarg bird cliffs, Dynjandi waterfall).
Includes Kerlingarfjöll (geothermal rhyolite mountains) and Tröllaskagi Peninsula (steep peaks, ski touring, heli-skiing).
Highland roads (F-roads) require 4x4 and are open only in summer (typically June–September). Always check road.is for conditions.