The Ptarmigan Tunnel was built in 1930 through the Ptarmigan Wall at an elevation of 7,200 feet (2,200 m) in Glacier National Park, near Many Glacier, in Montana, US. The 250-foot (76 m) manmade tunnel allows hikers to avoid a strenuous climb over very steep terrain between Many Glacier and the Belly River valley. Two opposing steel jackhammers drilling from either side of the tunnel and a series of ten-hole rounds of dynamite gradually broke through the mountain in less than three months.
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| - Tunnel de Ptarmigan (fr)
- Ptarmigan Tunnel (en)
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| - Le Tunnel de Ptarmigan, Ptarmigan Tunnel en anglais, a été construit en 1930 dans le mur de Ptarmigan à une altitude de 2 195 mètres dans le parc national de Glacier près de Many Glacier. Long de 76 mètres, ce tunnel évite aux randonneurs une ascension très raide entre Many Galcier et la vallée de la Belly River. Le tunnel fut percé en moins de trois mois à l'aide de deux marteaux-piqueurs creusant depuis chaque côté et de dynamite. Les murs intérieurs sont en roche naturelle. À l'extérieur, les portes sont entourées d'un mur de soutien. De lourdes portes métalliques furent ajoutées durant l’été 1975. Elles sont ouvertes de mi-juillet au 1er octobre si les conditions climatiques le permettent. (fr)
- The Ptarmigan Tunnel was built in 1930 through the Ptarmigan Wall at an elevation of 7,200 feet (2,200 m) in Glacier National Park, near Many Glacier, in Montana, US. The 250-foot (76 m) manmade tunnel allows hikers to avoid a strenuous climb over very steep terrain between Many Glacier and the Belly River valley. Two opposing steel jackhammers drilling from either side of the tunnel and a series of ten-hole rounds of dynamite gradually broke through the mountain in less than three months. (en)
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| - Glacier National Park MRA (en)
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| - The Ptarmigan Tunnel was built in 1930 through the Ptarmigan Wall at an elevation of 7,200 feet (2,200 m) in Glacier National Park, near Many Glacier, in Montana, US. The 250-foot (76 m) manmade tunnel allows hikers to avoid a strenuous climb over very steep terrain between Many Glacier and the Belly River valley. Two opposing steel jackhammers drilling from either side of the tunnel and a series of ten-hole rounds of dynamite gradually broke through the mountain in less than three months. A wide area, originally for guide and tourist horses, extends from each portal with a masonry retaining wall. Natural rock lines the interior walls. Heavy iron doors were hung across the tunnel adits during the summer of 1975. They remain open from mid-July until October 1, weather permitting. Designed by Ole Westman, this trail tunnel embodies exceptional qualities of landscape architecture and engineering in a pedestrian-scaled tunnel, cut through a sheer mountain wall. (en)
- Le Tunnel de Ptarmigan, Ptarmigan Tunnel en anglais, a été construit en 1930 dans le mur de Ptarmigan à une altitude de 2 195 mètres dans le parc national de Glacier près de Many Glacier. Long de 76 mètres, ce tunnel évite aux randonneurs une ascension très raide entre Many Galcier et la vallée de la Belly River. Le tunnel fut percé en moins de trois mois à l'aide de deux marteaux-piqueurs creusant depuis chaque côté et de dynamite. Les murs intérieurs sont en roche naturelle. À l'extérieur, les portes sont entourées d'un mur de soutien. De lourdes portes métalliques furent ajoutées durant l’été 1975. Elles sont ouvertes de mi-juillet au 1er octobre si les conditions climatiques le permettent. (fr)
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| - POINT(-113.70777893066 48.849166870117)
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