Meet your guide and group in Reykjavik early this morning (at 6.30am). We take the early bus (at 7am sharp) that drives along the mountain tracks that lead to Landmannalaugar, passing by the Hekla volcano and others volcanoes in the Domadalur area. Arriving in Landmannalaugar around noon, we have lunch then start out by crossing the 500-year-old Laugahraun lava flow that is still giving heat to Landmannalaugar hot springs. Climbing steadily past numerous Sulphur vents, we top a succession of rolling rhyolite hills before descending to the steaming hot springs of Stórihver. As we get higher, the better we can understand the forces of nature. Up on the plateau, steam rises in all directions from unseen vents and we reach the Hrafntinnusker mountain hut in the late afternoon. Distance: 12km/7.5mi, ascent: 470m/1502ft

Meals:  L,D

Today we head south into the canyon complex to the south of Hrafntinnusker. Descending into the gorges of Jökultungur, we come across steaming hot springs and mud pools. The route winds southwards, crossing old snow patches and climbing ridges where we have views across dark volcanic plains towards lake Álftavatn and the Mýrdalsjökull and Eyjafjallajökull glaciers. Crossing the southern edge of the Torfa-jökull Massif, we descend a long slope towards the black sands and palagonite ridges around Lake Álftavatn (Swan Lake). Arriving at the lake, one of the most beautiful locations on our route, we check in at the Álftavatn hut for our overnight stay. Distance: 12km/7.5 mi, descent: 490m/1610ft

Meals:  B,L,D

On day three there are several rivers to cross, as we head southwards and towards Mýrdalsjökull Icecap. Some of these glacial streams and rivers are bridged, but others need to be forded - a chilly experience for the feet so keep your river shoes handy. It can also be a good idea to wear your rain trousers to cut the cold. We descend to the green oasis of Hvanngil, where there is a mountain hut. We continue our walk, crossing another couple of rivers, to reach the surreal 5km-wide, black sand plain of Mælifellssandur, beneath the conical peak of Stórasúla. Heading now towards Hattfell, another ancient volcano, we reach the Emstrur region where farmers used to graze their sheep in summer. Before arriving at the Botnar Mountain Hut (our accommodation for the night) we visit the magnificent Markarfljót canyon, which is cut almost 200m into the rocks south of Hattfell. Distance: 16km/10mi, descent: 40m/131ft

Meals:  B,L,D

The first challenge today is to cross the bridge across Emstrur River. Having overcome this obstacle, we trek through the magnificent Markarfljót Canyon, which was carved out by thundering floods, caused by volcanic eruptions under the ice cap. The effects of erosion are visible at every step on this trek and nowhere more obvious than in the Þórsmörk Valley. For the first time on our trek, we enter a green and well-vegetated valley, which becomes more luxuriant the closer we get to Þórsmörk. The last part of the hike is through thick birch forest, where even the lava ridges are covered with scrubby trees and the lovely arctic flowers that bloom for a few weeks each summer. Þórsmörk means Þór's forest and it is not hard to see why this area should be considered to belong to a Norse God. It is out of this world! The valley is guarded on all sides by tremendous, fast-flowing rivers and steep glacier clad mountains. It is one of the most beautiful spots in Iceland and a weekend favourite for Reykjavik's hikers. Overnight in one of Þórsmörk's huts. Distance: 17km/10.5mi, descent: 300m/985ft

Meals:  B,L,D

We start the hike in the magic landscapes of Goðalönd – the abode of the Gods. Nesting at the foot of two glaciers this is a wonderland of ridges and cliffs covered by a multitude of flowers and grasses, certainly fit for gods and humans alike. Even the elves have made themselves at home here. We continue up the hills leading to the pass of Fimmvörðuháls, walking along the Kattarhryggir ridges with views to the impressive mountain of Útigönguhöfði up to Morinsheiði heath. At the end of the Morinsheiði plateu we enjoy the view of the lava stream that flowed down from the Fimmvörðuháls volcano in 2010. As we gain height above Morinsheiði we come to the lava and then to the two craters Magni and Móði that erupted prior to the main Eyjafjallajökull crater. We head back to Þórsmörk with the magnificent view over the glaciers and this beautiful valley for our celebration barbeque dinner and night in Básar hut. Distance: 20km/12.5mi, ascent/descent: 900m/2953ft

Meals:  B,L,D

We spend the last day in Þórsmörk, a hiker’s paradise, where we have an abundance of choice between various paths. For example, we can visit the Sönghellir cave (“Song cave”), climb up the small mountain of Valahnúkur from where the magnificent views can be enjoyed, or hike into the beautifully carved canyon Stakkholtsgjá. This oasis between the mountains is also an ideal place to relax and just enjoy nature. We take the 3pm bus to return to Reykjavik, arriving in the evening (approx 7.30pm). Distance: 5-10km/3-6mi

Meals:  B,L