Run by the Iran Mountaineering Association, this large utilitarian hostel is base camp for many of those aiming to summit Mt Damavand. Bunk beds in the simply decorated rooms are comfortable. It's IR50,000 extra for a shower, but if you rent a room (which has six bunk beds in it) there's an attached shower. No cafe, but there's a kitchen for self-catering.
This is also where you will have to pay US$50 for the permit to climb Damavand. The association also has a smaller dormitory complex in the nearby village of Rineh.