 During winter , visitors to the forest can participate in activities including <unk> , <unk> , and <unk> and cross @-@ country skiing . The <unk> Basin <unk> area is located within the forest north of Boise and has 7 <unk> and 53 runs on 2 @,@ 600 acres ( 11 km2 ) of <unk> terrain . There are 137 miles ( 220 km ) of <unk> <unk> trails in the Garden Valley system in the Emmett Ranger District and several Mongolian @-@ style <unk> available for rental in winter . 
