In spite of its northerly latitude, Iceland has relatively mild winters compared to similar places as far north because of the Gulf Stream. This makes backcountry skiing very popular as the conditions will be slightly more favourable than in other Scandinavian countries.

Outside of the aforementioned backcountry spots, there are many others as well. Just outside of the capital, Reykjavik, there are plenty of spots to see as well. The Sólheimajökull glacier is just 110 kilometers away from the capital and provides excellent views as well as terrains for backcountry skiing.
Eyjafjordur, just east of the Troll Peninsula, also offers plenty of excellent options. Including some hut-to-hut itineraries that allow you to fully immerse yourself in the Icelandic wilderness.