363 articles
Tajumulco
Tajumulco (Volcán Tajumulco) is a compound stratovolcano in San Marcos, Guatemala, the country's highest peak and Central America's highest volcano at about 4,203-4,220 m, with no confirmed historical eruptions.
Tanaga
Tanaga Volcano (VNUM 311080), 1,806 m stratovolcano on Tanaga Island, Alaska, central peak of the Sajaka-Tanaga-Takawangha cluster; last erupted 1914; monitored by AVO; main hazard is ash to aircraft.
Tata Sabaya
Tata Sabaya is a symmetrical stratovolcano rising to 5,430 m on the northern shore of the Salar de Coipasa salt flat in the Bolivian Altiplano.
Telescope Peak
Telescope Peak, highest summit of the Panamint Range at 11,049 ft (3,368 m), is the tallest mountain in Death Valley National Park, California, overlooking Badwater Basin, North America's lowest point.
Three Sisters (Oregon)
Three Sisters (Oregon): North, Middle, and South Sister, three aligned Cascade stratovolcanoes near Bend; South Sister is tallest at 3,157 m, with rhyolite eruptions about 2,000 years ago and ongoing uplift since the 1990s.
Tinguiririca
Tinguiririca (Morro de Azufre) is a 4,280 m active stratovolcano in Chile's O'Higgins Andes, part of a NNE-aligned volcanic complex with a 1917 eruption, fumaroles, and a 57 km Late Pleistocene debris avalanche.
Tipas
Tipas (Cerro Tipas, Walter Penk, Cazadero), a 6,658 m volcanic complex in Catamarca, Argentina, the world's third highest active volcano, SSW of Ojos del Salado, with no confirmed Holocene eruptions.
Tolima, Nevado del
Nevado del Tolima (Volcán Nevado del Tolima) is a 5,215 m glacier-clad andesitic-dacitic stratovolcano in Colombia's Ruiz-Tolima massif, 25 km south of Nevado del Ruiz; last known eruption 1943 CE, last major eruption about 3,600 years ago.
Toliman
Volcán Tolimán (also Northern Atitlán, Casuela Juyu) is a 3,158 m andesitic stratovolcano on the south shore of Lake Atitlán, Guatemala, twin of Atitlán, with no known historical eruptions and a young Cerro de Oro flank lava dome.
Toluca, Nevado de
Nevado de Toluca (Xinantécatl, Chicnauhtécatl) is a 4,680 m andesitic-dacitic stratovolcano in central Mexico, the country's fourth highest peak, with a crater holding the El Sol and La Luna lakes, a 1.5-million-year eruptive history, and a Holocene eruption about 3,300 years ago.
Trapper Peak
Trapper Peak, Montana's 10,157-ft summit in Ravalli County, is the highest peak of the Bitterroot Mountains and Selway-Bitterroot Wilderness, named in 1876, with a 4-mile hiking trail near Darby.
Tronador
Tronador (Monte Tronador, Cerro Tronador): extinct Pleistocene stratovolcano, ~3,478 m, on the Argentina-Chile border in Nahuel Huapi National Park; glacier-covered, last activity ~300 ka plus the postglacial Fonck cone.
Truchas Peak
Truchas Peak (South Truchas), 13,102-13,107 ft, is New Mexico's second-highest independent summit, in the Pecos Wilderness of the Sangre de Cristo Mountains about 20 miles northeast of Santa Fe; highest point of Mora and Rio Arriba counties.
Tujle, Cerro
Cerro Tujle (Cerro Tucle, Cerro Tugle) is an isolated Quaternary maar volcano in the Central Volcanic Zone, northern Chile, 21 km SE of the Salar de Atacama, 3,554 m high, with a 333 × 279 m andesitic crater formed by effusive-then-phreatomagmatic eruptions.
Tungurahua (landform)
Tungurahua, an active 5,023 m andesitic stratovolcano in Ecuador's Eastern Cordillera near Baños, erupted 1999–2016 with Strombolian, Vulcanian, and pyroclastic activity, frequent rain-generated lahars, and now sits in repose.
Tupungatito
Tupungatito is a 5,660 m active stratovolcano on the Chile-Argentina border, 90 km east of Santiago; northernmost historically active central Chilean Andes volcano, last erupting in 1987, now at green alert.
Turrialba
Turrialba (volcano), Costa Rica's second-highest volcano at 3,340 m, an active stratovolcano 10 km NE of Irazú near Cartago; dormant after 1864-66, it erupted ash from 2010 to 2022 and remains at OVSICORI-UNA Warning level.
Tutupaca
Tutupaca, a 5,801 m dacitic dome complex and stratovolcano in Tacna, southern Peru; last erupted 1802 CE, produced the Andes' youngest debris avalanche, and hosts a high-enthalpy geothermal field.
Ubinas
Ubinas, Peru's most active andesitic stratovolcano in Moquegua region, 70 km from Arequipa; frequent VEI 2-3 eruptions from a 1.4-km-wide summit crater, most recently 2023-2024.
Uncompahgre Peak
Uncompahgre Peak, highest summit of Colorado's San Juan Mountains at 14,318 ft (LiDAR; 14,309 ft in 1963 USGS survey), sixth-highest Colorado fourteener, in Uncompahgre Wilderness near Lake City; Class 2 South Ridge route.
Unnamed point
Unnamed point: a summit with no official name, labeled in peak lists by elevation (Peak 2390, p. 6436) and grid coordinates; common in Andes catalogs, counted as independent peaks by prominence thresholds.
Victoria Peak (landform)
Victoria Peak, a 2,159-2,163 m mountain in the Sutton Range of Vancouver Island, British Columbia; third highest island summit, prominence 1,829 m, official name since 1934, near Warden Peak west of Campbell River.
Villarrica
Villarrica (Rukapillán) is Chile's most active stratovolcano, 2,847 m in the Araucanía lake district, an open-vent volcano with a persistent lava lake, 50 eruptions in 500 years, and the tourist towns of Villarrica and Pucón at its foot.
Vinicunca
Vinicunca, also called Rainbow Mountain or Montaña de Siete Colores, is a mineral-striped peak in Peru's Vilcanota range near Cusco, viewpoint about 5,036 m, colors from iron oxide, chlorite, and sulfur sediments, a mass tourism site since 2015 managed by local communities.
Volcan Domuyo
Volcán Domuyo (Cerro Domuyo), a Pleistocene dacitic dome complex in northern Neuquén, Argentina; at 4,709 m the highest peak in Patagonia, with glaciers, geysers, a ~1 GW geothermal field, and no known Holocene eruptions.
Volcan San Pedro
Volcan San Pedro: chiefly a 6,145 m historically active Chilean Andes stratovolcano (San Pedro-San Pablo twin, Antofagasta); also a 3,020 m Lake Atitlan volcano in Guatemala and a 3,621 m Maule, Chile volcano.
Vsevidof
Mount Vsevidof is a symmetrical Holocene stratovolcano on Umnak Island in Alaska's Aleutian arc, 2,160 m high, with an ice-filled 1.2 km summit crater; last confirmed eruption 1878, unmonitored, moderate threat.
Wedge Mtn.
Wedge Mtn. (Wedge Mountain), 2,891 m, is the highest peak in Garibaldi Provincial Park, BC, east of Whistler; named 1932 over 'Mount Vancouver', first recorded ascent by Neal Carter and Charles Townsend, 10 September 1923.
Wheeler Peak (mountain, United States)
Wheeler Peak (13,063 ft) is Nevada's second-highest mountain and the high point of Great Basin National Park in the Snake Range; named for surveyor George M. Wheeler in 1869, home to Nevada's only glacier and ancient bristlecone pines.
White Mtn. Peak
White Mountain Peak (Tos-toya), California fourteener in the White Mountains, Mono County; about 14,245-14,252 ft, ~7,193 ft prominence, 67.4 mi isolation, highest point of the range and county, with a UC research summit hut.