Wildboys is a small Hiking tour operation in East Iceland. They organize tours every month, all year round where safety and your well-being are their number one priorities.
There are many majestic mountains in the east and these guys have hiked most of them. They also go on hikes into the highlands, 3 days hikes to Askja and Kverkfjöll. Feel free to contact them to see if they have a tour for you. If not, they will create one for you that suits your needs!