Question: The longest and largest glacier in France is smaller than what glacier in the Alps?

full_context: Document 1: Theodul Glacier: The Theodul Glacier (also spelled "Theodule Glacier"; German: "Theodulgletscher" ) is a glacier of the Alps, located south of Zermatt in the canton of Valais. It lies on the Swiss side of the Pennine Alps, although its upper basin touches the Italian region of the Aosta Valley. The glacier descends from the west side of the Breithorn (4164 m ) and splits into two diverging branches above Gandegg: the Upper Theodul Glacier ("Oberer Theodulgletscher"), spilling on a high plateau near Trockener Steg, together with the Furgg Glacier, and the Lower Theodul Glacier ("Unterer Theodulgletscher"), reaching a height of about 2500 m above the Gorner Glacier. Both branches are part of the Rhone basin, through the rivers Gornera, Mattervispa, and Vispa. Slightly above the glacier splitting is the Theodul Pass, crossing the border between Switzerland and Italy, and connecting Zermatt to Breuil-Cervinia. On the west, the Theodul Glacier is overlooked by the Matterhorn.
Document 2: Flaine: Flaine is a ski area in the Haute Savoie region of the French Alps, and is a part of the linked Grand Massif domain. It is in the territory of the communes of Magland and Arâches-la-Frasse. Flaine is linked to Samoëns, Morillon, Les Carroz and Sixt-Fer-à-Cheval, with 267 km of pistes in total. It featured the first 8-seater high speed chairlift, Les Grands Vans, and the first snow cannons to be installed in Europe. Flaine is often called the "big snowy bowl" due to it having one of the best snow records in the Alps. It is a modern, car-free resort with a wealth of amenities, all within close proximity to the accommodation.
Document 3: Bara Shigri Glacier: Bara Shigri is the largest glacier located in the state of Himachal Pradesh, India, Bara-Sigri glacier which is the second longest glacier in Himalaya after Gangotri, both are around 30 km long. The glacier is located in the Chandra Valley of Lahaul. The glacier feeds the Chenab River.
Document 4: Vanoise massif: The Vanoise massif is a mountain range of the Graian Alps, located in the Western Alps. After the Mont Blanc Massif and the Massif des Écrins it is the third highest massif in France, reaching a height of 3,885m at the summit of Grande Casse. It lies between Tarentaise Valley to the north and the Maurienne valley in the south. The range is the site of France's first National Park in 1963, the Vanoise National Park. The ski resorts of Tignes and Val-d'Isère and the 2,770m high Col de l'Iseran are located in the eastern part of the range.
Document 5: Mer de Glace: The Mer de Glace is a valley glacier located on the northern slopes of the Mont Blanc massif, in the French Alps. It is 7.5 km long and 200 m deep but, when all its tributary glaciers are taken into account, it can be regarded as the longest and largest glacier in France, and the second longest in the Alps after the Aletsch Glacier.
Document 6: Baltoro Glacier: The Baltoro Glacier (Urdu: ‎ ), at 63 km in length, is one of the longest glaciers outside the polar regions. It is located in the Gilgit-Baltistan region (the northernmost political entity of Pakistan). It runs through part of the Karakoram mountain range. The Baltoro Muztagh lies to the south and east of the glacier, while the Masherbrum Mountains lie to the south. At 8,611 m (28,251 ft), K2 is the highest mountain in the region, and three others within 20 km top 8,000 m.
Document 7: Alps: The Alps ( ; French: "Alpes" ] ; German: "Alpen" ] ; Italian: "Alpi" ] ; Romansh: "Alps" ; Slovene: "Alpe" ] ) are the highest and most extensive mountain range system that lies entirely in Europe, stretching approximately 1,200 km across eight Alpine countries: Austria, France, Germany, Italy, Liechtenstein, Monaco, Slovenia, and Switzerland. The mountains were formed over tens of millions of years as the African and Eurasian tectonic plates collided. Extreme shortening caused by the event resulted in marine sedimentary rocks rising by thrusting and folding into high mountain peaks such as Mont Blanc and the Matterhorn. Mont Blanc spans the French–Italian border, and at 4810 m is the highest mountain in the Alps. The Alpine region area contains about a hundred peaks higher than 4000 metres (just over 13,000 feet).
Document 8: Lötschenlücke: The Lötschenlücke (el. 3164 m.) is a high mountain pass of the Bernese Alps, connecting the Lötschental to the valley of the Aletsch Glacier in the canton of Valais. Both sides of the pass are covered by glaciers: the Langgletscher on the west and the Grosser Aletschfirn on the east. The Lötschenlücke lies between the Mittaghorn on the north and the Sattelhorn on the south.
Document 9: Whitney Glacier: The Whitney Glacier is a glacier situated on Mount Shasta, in the U.S. state of California. The Whitney Glacier is the longest glacier and the only valley glacier in California. In area and volume, it ranks second in the state behind the nearby Hotlum Glacier. In 1986, the glacier was measured to be 126 ft deep and over three km in length. The glacier starts on Mount Shasta's Misery Hill at 13700 ft and then it flows northwestward down to the saddle between Mount Shasta and Shastina. There is a major icefall that occurs there since the ground is very uneven at 11800 ft . Past the icefall, the glacier flows down the valley between Mount Shasta and Shastina with the terminus at 9500 to .
Document 10: Aletsch Glacier: The Aletsch Glacier (German: "Aletschgletscher" ) or Great Aletsch Glacier ("Grosser Aletschgletscher ") is the largest glacier in the Alps. It has a length of about 23 km (2014), has about a volume of 15.4 km3 (2011), and covers about 81.7 km2 (2011) in the eastern Bernese Alps in the Swiss canton of Valais. The Aletsch Glacier is composed of four smaller glaciers converging at Concordia Place, where its thickness was measured by the ETH to be still near 1 km . It then continues towards the Rhône valley before giving birth to the Massa. The Aletsch Glacier is – like most glaciers on this world – a retreating glacier. As of 2016, since 1980 it lost 1.3 km of its length, since 1870 3.2 km , and lost also more than 300 m of its thickness.
Document 11: Grison Alps: The Grison Alps are the mountains of the Graubünden canton of Switzerland (Grisons being the English name for the Graubünden region). There are many significant peaks in the Grison Alps, including the Tödi (3,614 m) and the highest peak, Piz Bernina (4,049 m). Many of the mountain ranges feature extensive glaciers, such as at the Adula, the Albula, the Silvretta, the Bernnina or the Rätikon range. The Grison Alps include parts of both the Eastern Alps and the Western Alps. The Eastern Alps located in Graubünden are the Rhaetian Alps, which is part to the Central Eastern Alps. The Rhaetian Alps consists of the following mountain ranges: Samnaun Alps, Rätikon, Silvretta, Sesvenna Range, Albula Range, Plessur Range, Oberhalbstein Range, Livigno Range, Bregaglia Range and the Bernina Range. The Western Alps located in Graubünden, include portions of the Lepontine Alps and the Glarus Alps.
Document 12: Jackson Glacier: 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.
Document 13: Harrison Glacier: 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.
Document 14: Sommet de la Saulire: Sommet de la Saulire is a mountain of Savoie, France. It lies in the Massif de la Vanoise range. It has an elevation of 2,738 metres above sea level. In the winter, it is used for skiing, and is located between the two towns, Courchevel and Meribel. These two towns are towns in the three valleys, which is a popular ski resort in the french alps. The mountain has slopes that go to Courchevel, and slopes that go to Meribel.
Document 15: Courmayeur: Courmayeur is a town and "comune" in northern Italy, in the autonomous region of Aosta Valley. At an elevation of 1224 m above sea level, it is located at the foot of the southern side of Mont Blanc, at 4810 m the highest point in the Alps and western Europe (see Seven Summits), and is crossed by the Dora Baltea river. Courmayeur shares administration of Mont Blanc with its neighboring commune of Saint-Gervais-les-Bains in France, and is consequently able to claim the title of highest commune in Italy. Courmayeur also shares access to the glacial ski run of the "Vallée Blanche" with another French town, Chamonix, which sits at the opposite, northern, side of the Mont Blanc massif.
ground_truth: Aletsch Glacier