Question: What is the geographical feature that includes Mount Henry, in the state where Gibson Dam is located, a part of?

full_context: Document 1: Iceberg Peak (Montana): Iceberg Peak () is located in the Lewis Range, Glacier National Park in the U.S. state of Montana. Iceberg Peak rises more than above Iceberg Lake and is considered a difficult climb due to the steepness and exposure climbers must endure. The peak sits astride the continental divide WNW of Mount Wilbur.
Document 2: Lewis Range: The Lewis Range is a mountain range located in the Rocky Mountains of northern Montana, United States and extreme southern Alberta, Canada. It was formed as a result of the Lewis Overthrust, a geologic thrust fault resulted in the overlying of younger Cretaceous rocks by older Proterozoic rocks. The range is located within Waterton Lakes National Park in Alberta, Canada and Glacier National Park and the Bob Marshall Wilderness Complex in Montana, United States. The highest peak is Mount Cleveland at .
Document 3: Mount Phillips (Montana): Mount Phillips () is located in the Lewis Range, Glacier National Park in the U.S. state of Montana. Lupfer Glacier is located on the east slope of Mount Phillips.
Document 4: Glacier View Dam: Glacier View Dam was proposed in 1943 on the North Fork of the Flathead River, on the western border of Glacier National Park in Montana. The tall dam, to be designed and constructed by the U.S. Army Corps of Engineers in the canyon between Huckleberry Mountain and Glacier View Mountain, would have flooded in excess of of the park. In the face of determined opposition from the National Park Service and conservation groups, the dam was never built.
Document 5: Gibson Dam: Gibson Dam is a concrete arch dam on the Sun River, a tributary of the Missouri River, about west of Great Falls, Montana in the United States. Located on the eastern edge of the Rocky Mountains, the dam was built by the U.S. Bureau of Reclamation (USBR) between 1926 and 1929 as part of the Sun River Project to develop about of irrigated land in the Sun River Valley.
Document 6: Montana: The northern section of the Divide, where the mountains give way rapidly to prairie, is part of the Rocky Mountain Front. The front is most pronounced in the Lewis Range, located primarily in Glacier National Park. Due to the configuration of mountain ranges in Glacier National Park, the Northern Divide (which begins in Alaska's Seward Peninsula) crosses this region and turns east in Montana at Triple Divide Peak. It causes the Waterton River, Belly, and Saint Mary rivers to flow north into Alberta, Canada. There they join the Saskatchewan River, which ultimately empties into Hudson Bay.
Document 7: Mount Jackson (Montana): Mount Jackson (10,052 feet (3,064 m)) is located in the Lewis Range, Glacier National Park in the U.S. state of Montana. Mount Jackson is the fourth tallest mountain in Glacier National Park and it is situated on the Continental Divide. Both the mountain and its namesake Jackson Glacier are easily seen from the Going - to - the - Sun Road. On the southern flanks of Mount Jackson is Harrison Glacier, the largest remaining glacier in the park. Route Descriptions can be found on Summitpost or in ``A Climbers Guide to Glacier National Park.
Document 8: Montana: East of the divide, several roughly parallel ranges cover the southern part of the state, including the Gravelly Range, the Madison Range, Gallatin Range, Absaroka Mountains and the Beartooth Mountains. The Beartooth Plateau is the largest continuous land mass over 10,000 feet (3,000 m) high in the continental United States. It contains the highest point in the state, Granite Peak, 12,799 feet (3,901 m) high. North of these ranges are the Big Belt Mountains, Bridger Mountains, Tobacco Roots, and several island ranges, including the Crazy Mountains and Little Belt Mountains.
Document 9: Ryan Dam: Ryan Dam is a hydroelectric dam on the Missouri River, downstream from the city of Great Falls in the U.S. state of Montana. The dam is long and high; its reservoir is long and has a storage capacity of . It is a run-of-river dam. The dam is built on the largest of the five Great Falls of the Missouri, the "Big Falls", also sometimes called "Great Falls". Since 1915, the six-unit powerhouse on the left side of the dam has occupied a significant portion of the high waterfall.
Document 10: Pyramid Peak (Montana): Pyramid Peak () is in the Lewis Range, Glacier National Park in the U.S. state of Montana. Mokowanis Lake lies just northeast of the peak, and Atsina Lake is to the west.
Document 11: Montana: East of the divide the Missouri River, which is formed by the confluence of the Jefferson, Madison and Gallatin rivers near Three Forks, flows due north through the west-central part of the state to Great Falls. From this point, it then flows generally east through fairly flat agricultural land and the Missouri Breaks to Fort Peck reservoir. The stretch of river between Fort Benton and the Fred Robinson Bridge at the western boundary of Fort Peck Reservoir was designated a National Wild and Scenic River in 1976. The Missouri enters North Dakota near Fort Union, having drained more than half the land area of Montana (82,000 square miles (210,000 km2)). Nearly one-third of the Missouri River in Montana lies behind 10 dams: Toston, Canyon Ferry, Hauser, Holter, Black Eagle, Rainbow, Cochrane, Ryan, Morony, and Fort Peck.
Document 12: Montana: The topography of the state is roughly defined by the Continental Divide, which splits much of the state into distinct eastern and western regions. Most of Montana's 100 or more named mountain ranges are concentrated in the western half of the state, most of which is geologically and geographically part of the Northern Rocky Mountains. The Absaroka and Beartooth ranges in the south-central part of the state are technically part of the Central Rocky Mountains. The Rocky Mountain Front is a significant feature in the north-central portion of the state, and there are a number of isolated island ranges that interrupt the prairie landscape common in the central and eastern parts of the state. About 60 percent of the state is prairie, part of the northern Great Plains.
Document 13: Gibson Reservoir: Gibson Reservoir is located just south of the Bob Marshall Wilderness in Montana. The reservoir is formed by the concrete arch Gibson Dam and backs water up between a hilly pass for about 3 miles. The water in the dam is initially provided by spring snow runoff and carried there via the North Fork Sun River and the South Fork Sun River right after the two join. The reservoir is mainly used for irrigation control.
Document 14: Geography of the United States: The Great Plains come to an abrupt end at the Rocky Mountains. The Rocky Mountains form a large portion of the Western U.S., entering from Canada and stretching nearly to Mexico. The Rocky Mountain region is the highest region of the United States by average elevation. The Rocky Mountains generally contain fairly mild slopes and wider peaks compared to some of the other great mountain ranges, with a few exceptions (such as the Teton Mountains in Wyoming and the Sawatch Range in Colorado). The highest peaks of the Rockies are found in Colorado, the tallest peak being Mount Elbert at 14,440 ft (4,400 m). The Rocky Mountains contain some of the most spectacular, and well known scenery in the world. In addition, instead of being one generally continuous and solid mountain range, it is broken up into a number of smaller, intermittent mountain ranges, forming a large series of basins and valleys.
Document 15: Mount Henry (Montana): Mount Henry () is located in the Lewis Range, Glacier National Park in the U.S. state of Montana. Mount Henry is just south of Appistoki Peak in the Two Medicine region of the park.
ground_truth: Rocky Mountains
sub_queries: Which state is Gibson Dam located? Answer: Montana
Mount Henry (Montana ) >> part of Answer: Lewis Range
Lewis Range >> part of Answer: Rocky Mountains