Europe
Fimmvörðuháls Trail
The Fimmvörðuháls Trail is one of the best hikes in Iceland. The trail follows the Skoga River from Skogafoss Falls at sea level up between the Eyjafjallajökull and Mýrdalsjökull glaciers and on into the Thorsmork Valley. The trail is 25 km with 1000 m of elevation gain.
There is a hotel, a hostel, and a large camping area at the Skogafoss trailhead. By evening, the camping area was quite full. You can do the hike as an out and back from Skogafoss to the bridge. With two cars, or skill with local mass transit, you could do a through hike. There are also guided through hikes that originate in Reykjavik.