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Near Canmore, Alberta, T0L, Canada

Reconnu formellement en: 1987/03/12

Rat's Nest Cave Provincial Historic Resource, near Canmore (date unknown); Alberta Culture and Community Spirit - Royal Alberta Museum, date unknown
Rat's Nest Cave Provincial Historic Resource, near Canmore (date unknown); Alberta Culture and Community Spirit - Royal Alberta Museum, date unknown
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Autre nom(s)

Canmore Caverns

Liens et documents

Date(s) de construction

Inscrit au répertoire canadien: 2009/03/08

Énoncé d'importance

Description du lieu patrimonial

Rat's Nest Cave is situated on the south-facing slope of Grotto Mountain, roughly six kilometres east of Canmore. The subterranean site contains more than four kilometres of tunnels and a variety of geological and paleontological features, including stalactites, stalagmites, and deposits of animal remains.

Valeur patrimoniale

The heritage value of Rat's Nest Cave lies in its remarkable geological formations and its rich collection of paleontological resources.

Rat's Nest Cave was dissolved out of limestone of the Livingstone and Mount Head formations deposited near the end of the Devonian period, roughly 350 million years ago. The Front Ranges of the Rocky Mountains began to rise from these formations approximately 85 million years ago, during the Late Cretaceous Period. The titanic forces that compressed, thrusted, folded, and fractured the rock of the mountains created faults and seams that evolved into underground rivers of groundwater serving a vast subterranean drainage system. The Rat's Nest Cave began as one of these waterways. In time, the volume of the cave expanded as water widened the fracture in the limestone.

The several advances and retreats of the Bow Glacier in the late Quaternary period, 120-12,000 years ago, further shaped the mountain environment. During glacial retreats, massive amounts of water flowed through Rat's Nest Cave, expanding tunnels and imparting to the site much of its distinctive geological form. Roughly 12-13,000 years ago, the Bow Glacier made its final retreat; in its wake, the passages of Rat's Nest Cave slowly emptied of water. The drying of the cave enabled the precipitation of travertine formations created through the interaction of meteoric waters and calcium carbonate, the primary constituent of limestone. The spectacular and varied travertine formations in Rat's Nest Cave imbue the site with a rare kind of beauty.

Following the draining of Rat's Nest Cave, the site became home to a rich variety of animal species. Skeletal remains of dozens of creatures have been discovered in the cave, including paleontological specimens of birds, snakes, fish, and several amphibians. The cave also contains the remains of over 30 mammalian species. The many and varied paleontological resources of the cave exist alongside the diversity of insects, arachnids, and worms that presently inhabit the site. The human presence in the cave has been established by the discovery of prehistoric tools found at the site that date from roughly 3000 years ago. The site also contains a number of pictographs.

Source: Alberta Culture and Community Spirit, Historic Resources Management Branch (File: Des. 1510)

Éléments caractéristiques

The character-defining elements of Rat's Nest Cave include such features as:
- ready access to cave;
- shape and material composition of cave;
- geological formations, including variety of travertine deposits;
- paleontological resources;
- prehistoric artifacts and pictographs.




Autorité de reconnaissance

Province de l'Alberta

Loi habilitante

Historical Resources Act

Type de reconnaissance

Ressource historique provinciale

Date de reconnaissance


Données sur l'histoire

Date(s) importantes


Thème - catégorie et type

Exprimer la vie intellectuelle et culturelle
Les sciences

Catégorie de fonction / Type de fonction



Élément naturel

Architecte / Concepteur




Informations supplémentaires

Emplacement de la documentation

Alberta Culture and Community Spirit, Historic Resources Management Branch, Old St. Stephen's College, 8820 - 112 Street, Edmonton, AB T6G 2P8 (File: Des. 1510)

Réfère à une collection

Identificateur féd./prov./terr.




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