The Snow Fort, also referred to as the Ice Castle, is a members-only seasonal land den originally released in December 2012. It has returned each year during Jamaa's winter months, and it most recently started another release in the Den Shop during December 2017.
The Snow Fort den is a big ice fort. There is a frozen river next to the structure. There are two levels with a staircase connecting both levels. Outside, there rests several piles of snowballs. In the top-right corner, there is an ice blower (similar to the mud in Appondale) that gives animals an arctic-blue ice tint when they stand in it. The Snow Fort Den wallpapers and flooring are ice-themed.
It has the same basic build as the New Years Party 2013 den, with a few turrets added and flipped around the X-axis.