Four members of BSSAR responded to a page at Rat Lake near Garnet Mountain. Snowmobiles were used to access the area at Garnett. Upon arrival, BSSAR members encountered several backcountry skiers/snowmobilers and 2 members of the Gallatin Valley helicopter rescue team. BSSAR members helped package the patient for the helicopter rescue. Patient sustained trauma to the pelvic/upper femoral area and was transported via helicopter to Bozeman Deaconess hospital. The total mission took about 4 hours.