Alpine tundra occupies high-mountain summits, slopes, and ridges above timberline. Above the timberline of the mountains is alpine tundra. Unlike alpine timberlines, the northern timberline occurs at low elevations. They are mostly located above the timberline and alpine pastures. North of the arctic timberline lies the low-growing tundra, and southwards lies the boreal forest. A forest of mountain hemlock and fir grows up to the timberline at about . Its habitat consists of grassy slopes below the timberline. Boise, Borah, Capital, Timberline, the alternative Frank Church, and the West Ada School district's Centennial. With the exception of Sierra Sidewinder and Timberline Twister, the rides are relatively tame. Pack rats live anywhere from low, hot, dry deserts to cold, rocky slopes above timberline. The film was filmed in Mount Hood, Sandy River and Timberline, Oregon. Frank Roosevelt's vision of winter sports at Timberline Lodge took hesitant steps the following year. Lifts listed for potential upgrade included the Spillway, Double Runner, Timberline, and West Mountain chairlifts. Right below the timberline, in the Hudsonian zone, the whitebark, foxtail, and silver pines grow. The lodge and its grounds host a ski resort, also known as Timberline Lodge.