Question: According to the Blackfeet, where is the most sacred part of Glacier National Park located?
Context: Two Medicine is the collective name of a region located in the southeastern section of Glacier National Park, in the U.S. state of Montana.  It has a campground alongside Two Medicine Lake.  From the period starting in the late 1890s until the completion of the Going-to-the-Sun Road in 1932, Two Medicine was one of the most visited sections of the park.  Once part of a larger chalet complex, the Two Medicine Store is located along the shores of Two Medicine Lake and the building is a National Historic Landmark.  The region is a starting point for many trails and tourboats take visitors out on Two Medicine Lake, where the steep south face of Rising Wolf Mountain towers above the lake.  The region was considered sacred ground by several Native American tribes including the Blackfeet and they performed Vision quests here.  Aside from Chief Mountain, the Two Medicine area is the most sacred section of the park to the Blackfeet. Browning station is a train station in Browning, Montana.  It is a seasonal stop for Amtrak's "Empire Builder", open from October to April.  It serves Browning and the rest of the Blackfeet Indian Reservation, as well as the eastern side of Glacier National Park.  It functions as an alternate for the East Glacier Park station at Glacier National Park, which closes during the winter. Chief Mountain (also called Old Chief Mountain) is located in the U.S. state of Montana on the eastern border of Glacier National Park and the Blackfeet Indian Reservation.  The mountain is one of the most prominent peaks and rock formations along the Rocky Mountain Front, a 200 mi long overthrust fault, known as the Lewis Overthrust, which extends from central Montana into southern Alberta, Canada. The Blackfeet Nation also known as the Blackfeet Tribe of the Blackfeet Indian Reservation is an Indian reservation and headquarters for the Siksikaitsitapi people in the United States.  Located in Montana, its members are composed primarily of the Piegan Blackfeet ("Ampskapi Piikani") band of the larger ethnic group historically described as the Blackfoot Confederacy.  It is located east of Glacier National Park and borders the Canadian province of Alberta.  Cut Bank Creek and Birch Creek form part of its eastern and southern borders.  The reservation contains 3000 sqmi , twice the size of the national park and larger than the state of Delaware.  It is located in parts of Glacier and Pondera counties. Harrison Glacier is located in the US state of Montana in Glacier National Park.  Situated on a southeast facing ridge immediately south of Mount Jackson, Harrison Glacier is the largest glacier in Glacier National Park and was estimated in 2005 to have an area of 466 acre .  Though many experts have stated that all the glaciers in Glacier National Park may disappear by the year 2030, Harrison Glacier lost only 9 percent of its surface area in the 40-year period between 1966 and 2005 and will likely still exist well beyond 2030.  Compared to many of the vanishing glaciers in Glacier National Park, Harrison Glacier has a much higher altitude accumulation zone (approximately 9000 ft ) which has allowed it to maintain some equilibrium in its glacier mass balance.  Comparing images of the glacier taken in 1913 with those from 2009, indicates that the glacier has experienced thinning and retreat. Jackson Glacier is approximately the seventh largest of the remaining 25 glaciers in Glacier National Park located in the US state of Montana.  A part of the largest grouping of glaciers in the park, Jackson Glacier rests on the north side of Mount Jackson.  The glacier was most recently measured in 2005 at 250 acre , yet when first documented in 1850, the glacier also included the now separate Blackfoot Glacier and together, they covered 1875 acre .  Between 1966 and 2005, Jackson Glacier lost almost a third of its acreage.  When the two mountains were united prior to their separation sometime before 1929, they were known simply as Blackfoot Glacier.  In 1850, there were an estimated 150 glaciers in the park.  Glaciologists have stated that by the year 2030, many if not all of the glaciers in the park may disappear completely.  Jackson and Blackfoot glaciers have been selected for monitoring by the U.S. Geological Survey's Glacier Monitoring Research program, which is researching changes to the mass balance of glaciers in and surrounding Glacier National Park.  The glacier is being monitored using remote sensing equipment and repeat photography, where images of the glacier are taken from identical locations periodically.  Jackson Glacier is one of the easiest of the park's glaciers to observe, and is located south of the Going-to-the-Sun Road on the east side of the Continental Divide, upper St. Mary Valley. The Glacier National Park Fund (established in 1999), is an organization whose main goal is to raise money to support the demands of the Glacier National Park, located in West Glacier, Montana.  According to the National Park Service, the Glacier National Park Fund supports park projects, programs, and services in four areas: to preserve the park experience, to provide curriculum-based instruction, to research the park ecosystem, and to prepare for the 2010 Centennial year of the park.  The Glacier National Park Fund provided funds for different studies.  In July 2007, The Glacier National Park Fund funded a study involving human and bear aversion techniques.  Also, in 2009, The Glacier National Park Fund granted $10,000 to enable biologists to learn more about the Bighorn Sheep that inhabit Glacier National Park, along the park's boundary with the Blackfeet Indian Reservation.  The Glacier National Park Fund has an official mascot named Billy Bowman. James Willard Schultz, or Apikuni, (born August 26, 1859, died June 11, 1947) was a noted author, explorer, Glacier National Park guide, fur trader and historian of the Blackfeet Indians.  He operated a fur trading post at Carroll, Montana and lived among the Pikuni tribe during the period 1880-82.  He was given the name "Apikuni" by the Pikuni chief, "Running Crane".  "Apikuni" in Blackfeet means "Spotted Robe."  Schultz is most noted for his 37 books, most about Blackfoot life, and for his contributions to the naming of prominent features in Glacier National Park. Sherburne Peak is a 8610 ft mountain located in the Lewis Range, Glacier National Park in the U.S. state of Montana.  Sherburne Peak has two summits: the higher one being in Glacier National Park and the lower summit is located within the Blackfeet Indian Reservation. Divide Mountain (8665 ft ) is located in the Lewis Range, Glacier National Park in the U.S. state of Montana.  Divide Mountain is located south of Saint Mary, Montana on the border of Glacier National Park and the Blackfeet Indian Reservation.
Answer: eastern border of Glacier National Park and the Blackfeet Indian Reservation