The Mount Si NRCA encompasses 9,522 acres of land and is composed of steep, rugged and mountainous terrain.  Four mountain peaks are located within it's boundaries and include: Mount Si, Mount Teneriffe, Green Mountain, and Little Si, ranging from 1,600 to 4,800 feet in elevation.  The NRCA supports a variety of wildlife including native mountain goats, cougar, and black bear.  The NRCA also safeguards unique geologic features, examples of old growth forests, and sensitive plant species. On the Mount Si trail, hikers will experience walking through a heavily forested slope to reach the top. With clear weather, hikers are rewarded by a spectacular view of the Snoqualmie Valley, the Cascades, and Mt. Rainier from the summit of Mount Si.  (King County)