Question:  Ramona Falls is located in a forest along the trail that is part of the highest portion of which mountain ranges?
Context: The Southern Rocky Mountains are a major subregion of the Rocky Mountains of North America located in the southeastern portion of the U.S. state of Wyoming, the central and western portions of Colorado, the northern portion of New Mexico, and extreme eastern portions of Utah.  The Southern Rocky Mountains are also commonly known as the Southern Rockies, and since the highest peaks are located in the State of Colorado, they are sometimes known as the Colorado Rockies, although many important ranges and peaks rise in the other three states.  The Southern Rockies include the highest mountain ranges of the Rocky Mountains and include all 30 of the highest major peaks of the Rockies. The Pacific Crest Trail (commonly abbreviated as the PCT, and officially designated as the Pacific Crest National Scenic Trail) is a long-distance hiking and equestrian trail closely aligned with the highest portion of the Sierra Nevada and Cascade mountain ranges, which lie 100 to east of the U.S. Pacific coast.  The trail's southern terminus is on the U.S. border with Mexico, just south of Campo, California, and its northern terminus on the Canada–US border on the edge of Manning Park in British Columbia; its corridor through the U.S. is in the states of California, Oregon, and Washington. Malyavat Mountains is a mythical mountain range described in the epic Ramayana.  It is identified as the part of the mountain ranges in the east coast of India (Eastern Ghats) that falls in the northern Tamil Nadu and southern Andhra Pradesh.  Hanuman and Vanaras crossed this mountain during their wanderings in search of Sita the wife of Raghava Rama.  On their return journey from Lanka to Kosala, Rama and Sita had seen these mountain ranges. The Sierra de Gredos is a mountain range in central Spain that spans the provinces of Ávila, Salamanca, Cáceres, Madrid, and Toledo.  It is part of the much larger Central System of mountain ranges.  Its highest point is Pico Almanzor, at 2,592 metres and it has been declared a natural park by the Autonomous Community of Castile and León.  The Sierra de Gredos is one of the most extensive mountain ranges of the Central System; it comprises five river valleys: the Alto Tormes, the Alto Alberche, the Tiétar Oriental, the Tiétar Occidental y la Vera, and the Valle del Ambroz.  The first known inhabitants were the Vettones, a pre-Roman Celtic people.  The central part of the range encomprises the Sierra de Gredos Regional Park. Absaroka-Beartooth Wilderness was created from existing National Forest lands in 1978 and is located in Montana and Wyoming, United States.  The wilderness is partly in Gallatin, Custer and Shoshone National Forests and is composed of 944,000 acre .  The wilderness encompasses two distinct mountain ranges, namely the Beartooth and Absaroka ranges.  These ranges are completely distinct geologically speaking with the Absarokas composed primarily of volcanic (or extrusive) and metamorphic rock, while the Beartooths are made up almost entirely of granitic rocks.  The Absarokas are noted for their dark and craggy appearance, lush and heavily forested valleys and abundant wildlife.  The highest peak in the range, located in Wyoming, is Francs Peak at 13,153 ft .  The Beartooths are more alpine with huge treeless plateaus and the highest peak in the state of Montana (Granite Peak 12,799 ft ).  The wilderness contains 30 peaks over 12,000 ft .  The wilderness is an integral part of the 20 e6acre Greater Yellowstone Ecosystem and borders Yellowstone National Park. Mount Nyangani (formerly Mount Inyangani) is the highest mountain in Zimbabwe at 2,592 m (8,504 ft).  The mountain is located within Nyanga National Park in Nyanga District, is about 275 km north west Mutare.  The summit lies atop a small outcrop of rock around 40m above the surrounding area.  The remainder of the peak is a broad moor of mainly rolling hills and plateau with an area of about 8 km.  The edges of this plateau then fall steeply to the east and west sides.  The mountain vegetation is largely composed of heath around the summit plateau with evergreen forest along the wetter eastern slopes and grassland to the western side.  Annual rainfall totals are high (around 2200 mm) but long spells of dry weather occur during the winter period of May to August.  Due to its relatively low altitude and tropical location, snow falls very rarely, last recorded in August 1935. The Pacific Crest is the highest portion of the Sierra Nevada and Cascade Range mountain ranges on the West Coast of the United States. The Mineral Belt National Recreation Trail is an 11.6 mile all-season biking/walking trail that loops around Leadville, Colorado and through its historic mining district.  The trail's setting is quintessentially Colorado Rocky Mountain landscape.  Groves of aspen, conifer forests, wildflower meadows, and open vista sage parks are interspersed with once-booming mine sites.  Ever-present views of the Sawatch and Mosquito mountain ranges provide perspective and a sense of permanence to the area.  Several signs along the way provide historical snippets about Leadville's colorful past.  The trail is designed for bicycles, longboards, walkers, wheelchairs, strollers and in-line skaters.  When the snow falls, snowcats groom the trail to provide access to Nordic skiers, snowshoers and winter-bikers. Ramona Falls is a waterfall on the upper Sandy River on the west side of Mount Hood, Oregon, United States.  It is located in forest along the Pacific Crest Trail at an elevation of 3560 ft .  The falls are about 120 ft tall overall, consisting of a wall of cascades. Yocum Falls, is a waterfall located in the heart of the Mount Hood National Forest, in Clackamas County, in the U.S. state of Oregon.  It is located in a privileged area in Zigzag canyon with several waterfalls including Little Zigzag Falls and Ramona Falls.  The name, as well as Yocum Ridge, the south ridge of the Sandy Glacier on the west slope of Mount Hood, comes from businessman Oliver C. Yocum.
Answer: Sierra Nevada and Cascade