Le Haut-Couserans se compose de trois lignes de cr\u00eate parall\u00e8les d’orientation est-ouest :<\/p>\n
d’abord, un cha\u00eenon qui atteint les 1500 m, le front-nord pyr\u00e9n\u00e9en (massif de Sourroque, massif d’Erp-Soulan, col de Rille),
\n ensuite, la zone Adosse-Mirabat-Bouirex-Araing – Calabasse,
\n enfin la cha\u00eene axiale, sur la fronti\u00e8re avec l’Espagne, qui commence dans les montagnes d’Aulus, non loin du Pic de Montcalm (bassin de l’Ari\u00e8ge) et se poursuit jusqu’au Crab\u00e8re, sur la limite d\u00e9partementale avec la Haute-Garonne, en passant par les pics de Certescans, Mont Rouch, le Mont Valier, Barlongu\u00e8res et Mauberm\u00e9, tous ayant 2 500 \u00e0 2 800 m d’altitude. Sur ce trajet, la fronti\u00e8re ne descend jamais en dessous de 2 087 m (port de Salau). Les versants sont raides, puisque les fonds de vall\u00e9es, vers 1 200 m, sont rarement \u00e0 plus de 3 ou 4 km de la ligne de cr\u00eate.<\/p>\n
Au pied de ces montagnes, deux cours d’eau, le Salat et le Lez, son principal affluent, qui individualisent les deux grandes parties de la montagne couseranaise : le Haut-Salat et le Castillonnais.<\/p>\n
Dans le Castillonnais aux vall\u00e9es \u00e9troites (Biros, Bethmale), les villages sont essentiellement install\u00e9s sur les soulanes. Dans le Haut-Salat, les bassins int\u00e9rieurs (Oust-Seix, Massat, Erc\u00e9, Ustou) alternent avec les secteurs plus encaiss\u00e9s (gorge de la Ribaute entre Lacourt et Kerkabanac), tandis que les soulanes, sous forme de plateaux (Soulan, Cominac) ou de collines (Sentenac d’Oust) dominent l’ensemble.<\/p>\n
Dans le Haut-Salat, le pic de Montagnol et la vall\u00e9e d’Angouls ont \u00e9t\u00e9 class\u00e9s \u00ab Zone naturelle d’int\u00e9r\u00eat \u00e9cologique, faunistique et floristique \u00bb, en raison de leur flore de hautes montagnes calcaires avec plantes end\u00e9miques ou rares, et de la pr\u00e9sence d’une faune de montagne riche.<\/p>\n","url":"https:\/\/blog.elkami.fr\/category\/randonnees\/pyrenees\/haut-couserans\/","hasPart":[{"@type":"BlogPosting","@id":"https:\/\/blog.elkami.fr\/cirque-d-anglade\/","headline":"Cirque d’Anglade","url":"https:\/\/blog.elkami.fr\/cirque-d-anglade\/","datePublished":"2015-07-10","dateModified":"2022-07-05","mainEntityOfPage":"https:\/\/blog.elkami.fr\/cirque-d-anglade\/","author":{"@type":"Person","@id":"https:\/\/blog.elkami.fr\/author\/elkami\/#Person","name":"Elkami","url":"https:\/\/blog.elkami.fr\/author\/elkami\/","identifier":2,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/891004d75c83e8d15c760baecb39b7661bb72c362d87c6b74985f514b58d28a6?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/891004d75c83e8d15c760baecb39b7661bb72c362d87c6b74985f514b58d28a6?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Elkami","logo":{"@type":"ImageObject","@id":"https:\/\/blog.elkami.fr\/img\/moi.jpg","url":"https:\/\/blog.elkami.fr\/img\/moi.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/blog.elkami.fr\/img\/ngg_featured\/P1220434.JPG","url":"https:\/\/blog.elkami.fr\/img\/ngg_featured\/P1220434.JPG","height":960,"width":1280},"keywords":null},{"@type":"BlogPosting","@id":"https:\/\/blog.elkami.fr\/cirque-de-cagateille\/","headline":"Cirque de Cagateille","url":"https:\/\/blog.elkami.fr\/cirque-de-cagateille\/","datePublished":"2015-07-07","dateModified":"2022-07-05","mainEntityOfPage":"https:\/\/blog.elkami.fr\/cirque-de-cagateille\/","author":{"@type":"Person","@id":"https:\/\/blog.elkami.fr\/author\/elkami\/#Person","name":"Elkami","url":"https:\/\/blog.elkami.fr\/author\/elkami\/","identifier":2,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/891004d75c83e8d15c760baecb39b7661bb72c362d87c6b74985f514b58d28a6?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/891004d75c83e8d15c760baecb39b7661bb72c362d87c6b74985f514b58d28a6?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Elkami","logo":{"@type":"ImageObject","@id":"https:\/\/blog.elkami.fr\/img\/moi.jpg","url":"https:\/\/blog.elkami.fr\/img\/moi.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/blog.elkami.fr\/img\/ngg_featured\/P1220266.JPG","url":"https:\/\/blog.elkami.fr\/img\/ngg_featured\/P1220266.JPG","height":960,"width":1280},"keywords":null},{"@type":"BlogPosting","@id":"https:\/\/blog.elkami.fr\/etang-d-ayes\/","headline":"\u00c9tang d’Ayes","url":"https:\/\/blog.elkami.fr\/etang-d-ayes\/","datePublished":"2015-07-06","dateModified":"2022-07-05","mainEntityOfPage":"https:\/\/blog.elkami.fr\/etang-d-ayes\/","author":{"@type":"Person","@id":"https:\/\/blog.elkami.fr\/author\/elkami\/#Person","name":"Elkami","url":"https:\/\/blog.elkami.fr\/author\/elkami\/","identifier":2,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/891004d75c83e8d15c760baecb39b7661bb72c362d87c6b74985f514b58d28a6?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/891004d75c83e8d15c760baecb39b7661bb72c362d87c6b74985f514b58d28a6?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Elkami","logo":{"@type":"ImageObject","@id":"https:\/\/blog.elkami.fr\/img\/moi.jpg","url":"https:\/\/blog.elkami.fr\/img\/moi.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/blog.elkami.fr\/img\/ngg_featured\/P1220226.JPG","url":"https:\/\/blog.elkami.fr\/img\/ngg_featured\/P1220226.JPG","height":960,"width":1280},"keywords":null}]}