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Mt. Queen Bess
Mount Queen Bess is a 3,298-m peak at the north end of the Homathko Icefield in British Columbia's Coast Mountains, named for Elizabeth I, first climbed in 1942 by the Mundays and Henry Hall.
Mt. Ratz
Mount Ratz is a 3,090 m peak in the Boundary Ranges of the Coast Mountains, British Columbia, the highest summit of the Stikine Icecap, named 1924 for surveyor William F. Ratz and first climbed by Fred Beckey and Daniel Davis in 1964.
Mt. Sanford
Mount Sanford is a 16,237 ft (4,949 m) andesitic shield volcano, Alaska's sixth highest peak, in the Wrangell Mountains of Wrangell-St. Elias National Park. Named by Lt. Henry T. Allen in 1885; first ascent 1938 by Moore and Washburn; no historical eruptions.
Mt. Saugstad
Mount Saugstad, a 2,908 m peak in the Pacific Ranges of the Coast Mountains, British Columbia, south of Hagensborg; named for Rev. Christian Saugstad of the 1894 Norwegian Bella Coola colony; first climbed in 1951 by Dudra and Schoening.
Mt. Simpson
Mt. Simpson (Mount Simpson) is a peak in Papua New Guinea on New Guinea island at 10°2′S, 149°34′E; elevation is given as 2,660 m by OpenStreetMap and 2,883 m by climbing lists, with 1,863 m prominence.
Mt. Sir Alexander
Mount Sir Alexander, formerly Mount Kitchi and Mount Alexander Mackenzie, is a 3,270 m peak in Kakwa Provincial Park, British Columbia, at the northern limit of the continuously alpine Canadian Rockies; first climbed in 1929 by Buck, Gilmour, and Waffl.
Mt. Sir Sandford
Mount Sir Sandford, highest peak of the Selkirk Mountains, British Columbia (3,519–3,522 m), first climbed in 1912 by Palmer, Holway, Aemmer, and Feuz; remote ultra-prominent summit with west ridge classic route and Great Cairn Hut.
Mt. Stuart
Mount Stuart, 9,415 ft, is a granite peak in the Stuart Range, Washington Cascades, second-highest non-volcano in the range; named 1853 by McClellan; its 1.5-mile North Ridge (5.9) is a Fifty Classic Climbs route.
Mt. Tom White
Mount Tom White, an 11,191 ft (3,411 m) summit in Alaska's Chugach Mountains, GNIS ID 1411084, named for pioneer Tom White; prominence 7,591 ft, isolation 72 mi, in Chugach National Forest.
Mt. Torbert
Mount Torbert is an 11,413 ft (3,479 m) glaciated peak, highest point of the Tordrillo Mountains in south-central Alaska near Anchorage; not a volcano despite 1953 eruption misreports; first climbed in 1964.
Mt. Valpy
Mt. Valpy (Mount Valpy) is a 2,219 m peak in the Northern Coastal Ranges of British Columbia near Lakelse Lake, with 2,014 m of prominence (ultra), loose rock, and a 1992 West Face Gully first ascent.
Mt. Vancouver
Mount Vancouver (4,812 m) is the 15th highest peak in North America, a glaciated Saint Elias Mountains massif on the Yukon-Alaska border in Kluane and Glacier Bay national parks, first ascended July 5, 1949; its lower south summit is Good Neighbor Peak, Boundary Peak 181.
Mt. Veniaminof
Mount Veniaminof, an active andesitic stratovolcano with an ice-filled 8 x 11 km summit caldera on the Alaska Peninsula, 775 km southwest of Anchorage; 2507 m rim, at least 14 eruptions in 200 years, most recent 2021.
Mt. Victory (Keraroa)
Mount Victory (Keraroa) is an active stratovolcano on the Cape Nelson peninsula in Oro Province, Papua New Guinea, which erupted from about 1890 to 1935.
Mt. Waddington
Mount Waddington (formerly Mystery Mountain; Homalco Xwe7xw), 4,019 m, is the highest peak entirely within British Columbia and the Coast Range. First ascent 1936 by Wiessner and House; Mundays pioneered it from 1926.
Mt. Whyte Formation
Mount Whyte Formation: Middle Cambrian shale, limestone and siltstone unit of the southern Rocky Mountains and Alberta plains, named by Walcott, overlying the Gog Group beneath the Cathedral Formation, 516-513 Ma.
Mtorwi
Mtorwi is a 2,961 m mountain in the Kipengere Range, on the eastern side of Kitulo National Park, Makete District, Njombe Region, Tanzania; Tanzania's 7th listed summit, reached by trail from the Nhumbe valley.
Muchinga Mountains
The Muchinga Mountains, commonly mapped as the Muchinga Escarpment, are a mountain range in northeastern Zambia forming the western wall of the Luangwa Rift Valley.
Mud flat
A mud flat is a level coastal or lakeshore area of fine-grained sediment that the tide alternately covers and uncovers, forming in sheltered bays, estuaries, and lagoons.
Mulanje
Mulanje (Mount Mulanje, Mulanje Massif) is Malawi's highest mountain, 3,002 m, in the southeast near Mozambique; granite-syenite block with endemic Mulanje cedar, isolated Ruo River fish fauna, and 2025 UNESCO World Heritage listing.
Mull of Kintyre
Mull of Kintyre: southern headland of Scotland's Kintyre peninsula, site of a 1788 Northern Lighthouse Board light built by Thomas Smith with Robert Stevenson, automated 1996, Category A listed.
Müller Ice Cap
Müller Ice Cap is an ice cap on Axel Heiberg Island, Nunavut, Canada, named for glaciologist Fritz Müller, who led its first intensive study in 1959–1962.
Munkh Khairkhan
Munkh Khairkhan (Мөнххайрхан уул, 'Holy eternal mountain'), second highest mountain in Mongolia at about 4,200 m, a glaciated massif of the Mongol Altai in Bayan-Ölgii and Khovd provinces whose glaciers shrank 32% from 1990 to 2020.
Murals of the Hpo Win caves
The murals of the Hpo Win caves, or Po Win Taung, are Buddhist wall paintings in cave temples near Monywa, Myanmar, mostly from the 16th to 18th centuries.
Murano
Murano: island group in the northern Venetian Lagoon, 1.5 km from Venice, center of Venetian glassmaking since the 1291 furnace transfer; also known for the Glass Museum and Basilica of Santi Maria e Donato.
Murero Formation
Murero Formation, Middle Cambrian unit in the Iberian Chains, Zaragoza, NE Spain; classic Lagerstätte reported by de Verneuil in 1862, 14 trilobite biozones, Burgess Shale-type soft-bodied preservation, Spain's first Bien de Interés Cultural paleontological site (1997).
Murzuq Desert
Murzuq Desert (Idhan Murzuq, Sahra Marzuq), a roughly 61,000 km² Saharan sand sea in southwestern Libya near the Algerian and Niger borders, flanking the Mesak Settafet plateau, over the oil-bearing Murzuq Basin, with the town of Murzuq at its eastern edge.
Musala
Musala (Мусала), 2,925.4 m in Bulgaria's Rila Mountains, is the highest peak of Bulgaria and the Balkan Peninsula, seventh in Europe, with 2,473 m prominence, a weather station since 1932, and the BEO Moussala research observatory.
Mustique
Mustique: private island in the Grenadines, Saint Vincent and the Grenadines, bought by Colin Tennant in 1958 and run by the homeowner-owned Mustique Company; about 109 villas, one hotel, Basil's Bar, and a 1,000-yard no-take conservation area.
Muyua Island
Muyua Island, also Woodlark Island or Muyuw/Murua, is an ~874 km² island in Milne Bay Province, Papua New Guinea, ~600 km east of Port Moresby, with Miocene volcanics, megalithic burials, kula exchange ties, and the Woodlark Gold Project.