{"id":1007,"date":"2026-06-07T18:59:19","date_gmt":"2026-06-07T16:59:19","guid":{"rendered":"https:\/\/alpentreff.de\/item\/mer-de-glace\/"},"modified":"2026-06-08T11:04:10","modified_gmt":"2026-06-08T09:04:10","slug":"mer-de-glace","status":"publish","type":"citadela-item","link":"https:\/\/alpentreff.de\/en\/item\/mer-de-glace\/","title":{"rendered":"Mer de Glace"},"content":{"rendered":"<p style=\"font-size:1.15em;line-height:1.6;color:#3a352f;\">The Mer de Glace, at around 7 km long, is the largest glacier in France and has drawn visitors since the 19th century. The historic cog railway from Chamonix to Montenvers reaches the viewing balcony, from where a gondola and stairs lead down to the ice cave. The rapid glacier retreat is especially visible here.<\/p>\n<h2>Highlights<\/h2>\n<ul>\n<li>Largest glacier in France (around 7 km)<\/li>\n<li>Historic cog railway to Montenvers<\/li>\n<li>Walk-in ice cave in the glacier<\/li>\n<li>Visible glacier retreat<\/li>\n<\/ul>\n<h2>Good to know<\/h2>\n<table class=\"at-vergleich\" style=\"width:100%;border-collapse:collapse;font-size:14px;\">\n<tr style=\"background:#ffffff;\">\n<td style=\"padding:8px;border:1px solid #e3e0d8;width:34%;font-weight:600;\">Length<\/td>\n<td style=\"padding:8px;border:1px solid #e3e0d8;\">around 7 km (largest glacier in France)<\/td>\n<\/tr>\n<tr style=\"background:#fafaf8;\">\n<td style=\"padding:8px;border:1px solid #e3e0d8;width:34%;font-weight:600;\">Railway<\/td>\n<td style=\"padding:8px;border:1px solid #e3e0d8;\">Cog railway Chamonix\u2013Montenvers<\/td>\n<\/tr>\n<tr style=\"background:#ffffff;\">\n<td style=\"padding:8px;border:1px solid #e3e0d8;width:34%;font-weight:600;\">Extra<\/td>\n<td style=\"padding:8px;border:1px solid #e3e0d8;\">Ice cave (Grotte de Glace)<\/td>\n<\/tr>\n<tr style=\"background:#fafaf8;\">\n<td style=\"padding:8px;border:1px solid #e3e0d8;width:34%;font-weight:600;\">Note<\/td>\n<td style=\"padding:8px;border:1px solid #e3e0d8;\">strong glacier retreat<\/td>\n<\/tr>\n<\/table>\n<h2>Practical info<\/h2>\n<div style=\"background:#f3f1ec;border:1px solid #e3e0d8;border-radius:10px;padding:18px 20px;\">\n<p style=\"margin:6px 0;line-height:1.55;\"><strong style=\"color:#f25353;\">Getting there:<\/strong> By the Montenvers cog railway from Chamonix.<\/p>\n<p style=\"margin:6px 0;line-height:1.55;\"><strong style=\"color:#f25353;\">Best time:<\/strong> Roughly May to October (please verify).<\/p>\n<p style=\"margin:6px 0;line-height:1.55;\"><strong style=\"color:#f25353;\">Cost:<\/strong> Railway, gondola and ice cave payable (please verify).<\/p>\n<p style=\"margin:6px 0;line-height:1.55;\"><strong style=\"color:#f25353;\">Safety:<\/strong> Many steps down to the cave; sturdy footwear.<\/p>\n<p style=\"margin:12px 0 4px;\"><strong style=\"color:#f25353;\">Tips:<\/strong><\/p>\n<ul style=\"margin-top:0;\">\n<li>The markings on the slope show the former glacier level<\/li>\n<li>Combine with a Chamonix day and the Aiguille du Midi<\/li>\n<\/ul>\n<\/div>\n<h2>Background &amp; History<\/h2>\n<p>The Mer de Glace, the \u201cSea of Ice\u201d, is the largest glacier in France and winds in a mighty, crevasse-furrowed ice stream down from the Mont Blanc massif into the valley of Chamonix. Already in the 18th century the tremendous tongue of ice drew the first travellers, and English aristocrats on their Grand Tour were among the early admirers who viewed the spectacle from the Montenvers heights and thereby helped to found alpine tourism; even Mary Shelley had her creature wander across this sea of ice in \u201cFrankenstein\u201d.<\/p>\n<p>In 1908 the rack railway to Montenvers was opened, which has since brought visitors comfortably to the edge of the glacier, where year after year an ice tunnel is dug anew into the ice in order to make the interior of the glacier experienceable. Yet the Mer de Glace is also a haunting memorial to climate change: the glacier is retreating rapidly and is markedly losing thickness, and where the ice once reached close to the mountain station, visitors today must descend many hundreds of steps to the shrunken ice. Markings on the rock along the descent show mercilessly how high the ice still reached in earlier decades. Thus the sea of ice unites the pioneering age of Alpine tourism with the visible, disquieting testimony of a rapidly changing nature.<\/p>\n<div style=\"background:#221c1a;color:#fff;border-radius:10px;padding:18px 22px;margin-top:28px;\"><strong style=\"font-size:1.08em;\">Related<\/strong><\/p>\n<p style=\"margin:6px 0 12px;color:#d8d2cc;font-size:14px;\">To make your trip run smoothly , our guides and gear tips for this destination:<\/p>\n<div style=\"display:flex;flex-wrap:wrap;gap:10px;\"><a href=\"\/en\/wanderschuhe\/\" style=\"display:inline-block;background:#f25353;color:#fff;padding:9px 16px;border-radius:6px;text-decoration:none;font-weight:600;font-size:14px;\">Hiking boots \u2192<\/a><a href=\"\/en\/schichtenprinzip-bekleidung\/\" style=\"display:inline-block;background:#f25353;color:#fff;padding:9px 16px;border-radius:6px;text-decoration:none;font-weight:600;font-size:14px;\">Layering guide for clothing \u2192<\/a><a href=\"\/en\/packliste-tages-bergwanderung\/\" style=\"display:inline-block;background:#f25353;color:#fff;padding:9px 16px;border-radius:6px;text-decoration:none;font-weight:600;font-size:14px;\">Day-tour packing list \u2192<\/a><a href=\"\/en\/packliste-huettentour\/\" style=\"display:inline-block;background:#f25353;color:#fff;padding:9px 16px;border-radius:6px;text-decoration:none;font-weight:600;font-size:14px;\">Hut-tour packing list \u2192<\/a><a href=\"\/en\/huettenwandern-einsteiger\/\" style=\"display:inline-block;background:#f25353;color:#fff;padding:9px 16px;border-radius:6px;text-decoration:none;font-weight:600;font-size:14px;\">Hut hiking for beginners \u2192<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Die Mer de Glace ist mit rund 7 km L\u00e4nge der gr\u00f6\u00dfte Gletscher Frankreichs und seit dem 19. Jahrhundert ein Besuchermagnet. Die historische Zahnradbahn von Chamonix nach Montenvers erschlie\u00dft den Aussichtsbalkon, von dem eine Gondel und Treppen zur Eisgrotte hinabf\u00fchren. Der rasche Gletscherr\u00fcckgang ist hier besonders eindr\u00fccklich sichtbar. Highlights Gr\u00f6\u00dfter Gletscher Frankreichs (rund 7 km) [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":1040,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","citadela-item-category":[39,40,30],"citadela-item-location":[71],"class_list":["post-1007","citadela-item","type-citadela-item","status-publish","has-post-thumbnail","hentry","citadela-item-category-ausflugsziele-sehenswuerdigkeiten","citadela-item-category-gipfel-berge","citadela-item-category-wandern-bergtouren","citadela-item-location-haute-savoie-mont-blanc"],"_links":{"self":[{"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/citadela-item\/1007","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/citadela-item"}],"about":[{"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/types\/citadela-item"}],"replies":[{"embeddable":true,"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/comments?post=1007"}],"version-history":[{"count":2,"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/citadela-item\/1007\/revisions"}],"predecessor-version":[{"id":1543,"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/citadela-item\/1007\/revisions\/1543"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/media\/1040"}],"wp:attachment":[{"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/media?parent=1007"}],"wp:term":[{"taxonomy":"citadela-item-category","embeddable":true,"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/citadela-item-category?post=1007"},{"taxonomy":"citadela-item-location","embeddable":true,"href":"https:\/\/alpentreff.de\/en\/wp-json\/wp\/v2\/citadela-item-location?post=1007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}