Larsen Inlet (64°26′S 59°26′W / 64.433°S 59.433°W / -64.433; -59.433 (Larsen Inlet)) is an inlet, formerly ice-filled, 12 nautical miles (22 km; 14 mi) long in a north–south direction and 7 nautical miles (13 km; 8.1 mi) wide, between Cape Longing and Cape Sobral along the east coast of Graham Land, Antarctica.

Larsen inlet is at the east end of the Nordenskjöld Coast of the Antarctic Peninsula. It is south of Mount Hornsby and the Detroit Plateau. Mount Tucker and the Longing Peninsula are to the east, and the Sobral Peninsula is to the west. The inlet opens to the south onto the Weddell Sea. The mouth of the inlet is between Cape Sobral to the west and Cape Longing to the east.

Carl Anton Larsen, a Norwegian whaling captain, reported a large bay in this area in 1893, and Larsen's name was suggested for the feature by Edwin Swift Balch in 1902. The inlet was re-identified and charted by the Falkland Islands Dependencies Survey (FIDS) in 1947.

The 350 square kilometres (140 sq mi) Larsen Inlet ice shelf, north of the Larsen A Ice Shelf, was ice-filled in 1986, but mostly ice-free in 1988. The effect of an ice shelf like this disappearing is that glaciers that were held back by it start to side faster into the ocean.

Eastern features and nearby features, from south to north, include:

64°27′50″S 59°03′00″W / 64.46389°S 59.05000°W / -64.46389; -59.05000 A 10.65 kilometres (6.62 mi) wide bay indenting for 9 kilometres (5.6 mi) Nordenskjöld Coast northwest of Samotino Point and southeast of Porphyry Bluff. Formed as a result of glacier retreat in the last decade of the 20th century. Named after the ancient settlement of Pizos in Southern Bulgaria.

64°27′S 59°11′W / 64.450°S 59.183°W / -64.450; -59.183. A prominent rocky bluff extending from the coast to 2 nautical miles (3.7 km; 2.3 mi), between Larsen Inlet and Longing Gap. Mapped from surveys by the Falkland Islands Dependencies Survey (FIDS; 1960–61). Named by the UK Antarctic Place-Names Committee (UK-APC) after the buff-colored quartz-plagioclase-porphyry rock which is characteristic of this exposure.

64°25′S 59°07′W / 64.417°S 59.117°W / -64.417; -59.117. A cluster of four gable-shaped nunataks rising to about 400 metres (1,300 ft) high between Porphyry Bluff and Tower Peak. So named by UK-APC following British Antarctic Survey (BAS) geological work, 1978–79, from the windscoops associated with each nunatak.

64°25′S 59°18′W / 64.417°S 59.300°W / -64.417; -59.300. A group of three rock bluffs on the east side of Larsen Inlet. Mapped from surveys by FIDS (1960–61). Named by UK-APC for lan F.G. Hampton, FIDS physiologist at Hope Bay in 1959 and 1960.

64°23′S 59°09′W / 64.383°S 59.150°W / -64.383; -59.150. A peak, 855 metres (2,805 ft) high, whose rock exposure stands out clearly from an evenly contoured icefield 5 nautical miles (9.3 km; 5.8 mi) northwest of Longing Gap. First charted and given this descriptive name by the FIDS, 1945.

64°20′S 59°16′W / 64.333°S 59.267°W / -64.333; -59.267. A distinctive rock mountain mass 9 nautical miles (17 km; 10 mi) northwest of Longing Gap, overlooking Larsen Inlet. Mapped from surveys by FIDS (1960–61). Named by UK-APC after the Tucker Sno-cat Corporation of Medford, Oregon, makers of Sno-Cat vehicles.

64°17′S 59°17′W / 64.283°S 59.283°W / -64.283; -59.283. A mountain topped by a snow peak, 4 nautical miles (7.4 km; 4.6 mi) east of the northeast corner of Larsen Inlet. Surveyed by FIDS (1960–61) and named after Christopher G. Brading, FIDS surveyor at Hope Bay (1959–60), who, with I. Hampton, R. Harbour, and J. Winham, made the first ascent of this mountain.

64°17′S 59°21′W / 64.283°S 59.350°W / -64.283; -59.350. A prominent nunatak lying at the northeast corner of Larsen Inlet. Mapped from surveys by FIDS (1960–61). Named by UK-APC after the Holt Manufacturing Company of Stockton, California, which, in 1906, began commercial production of chain-track tractors, and the Holt Caterpillar Tractor Company of New York, founded two years later.

Northern features and nearby features, from west to east, include

64°13′S 59°42′W / 64.217°S 59.700°W / -64.217; -59.700. A deeply entrenched narrow glacier on the east side of Wolseley Buttress flowing southward from Detroit Plateau. Mapped by FIDS from surveys (1960–61). Named by UK-APC for Dan Albone, English designer of the Ivel tractor, the first successful tractor with an internal combustion engine.

64°12′45″S 59°41′20″W / 64.21250°S 59.68889°W / -64.21250; -59.68889 A ice-covered buttress rising to 1,688 metres (5,538 ft) high on the southeast side of Detroit Plateau. Situated between the upper courses of Pyke Glacier and Albone Glacier, 4.1 kilometres (2.5 mi) southwest of Zasele Peak and 5.15 kilometres (3.20 mi) northeast of Kopriva Peak. Steep and partly ice-free west, south and east slopes. Named after the medieval city of Bolghar, capital of Volga Bulgaria in the 8–15th century AD.

64°15′S 59°36′W / 64.250°S 59.600°W / -64.250; -59.600. A glacier 5 nautical miles (9.3 km; 5.8 mi) long, flowing southward from Detroit Plateau between Albone Glacier and Polaris Glacier. Mapped from surveys by FIDS (1960–61). Named by UK-APC for Geoffrey Pyke (1894-1948), English scientist who in 1941 originated the ideas developed by the Studebaker Corporation into the M-29 Tracked Cargo Carrier or "Weasel," the first really successful snow vehicle.

64°11′23″S 59°37′22″W / 64.18972°S 59.62278°W / -64.18972; -59.62278 An ice-covered peak rising to 1,250 metres (4,100 ft) high in the southeast foothills of Detroit Plateau. Situated between the upper courses of Polaris Glacier and Pyke Glacier, 4.82 kilometres (3.00 mi) west-northwest of Laki Peak, 6 kilometres (3.7 mi) north of Weasel Hill and 4.1 kilometres (2.5 mi) northeast of Bolgar Buttress. Precipitous and partly ice free west slopes. Named after the settlement of Zasele in Western Bulgaria.

64°15′S 59°33′W / 64.250°S 59.550°W / -64.250; -59.550. A small distinctive elevation in the ice piedmont 5 nautical miles (9.3 km; 5.8 mi) north of Larsen Inlet, between Pyke Glacier and Polaris Glacier. Mapped from surveys by FIDS (1960–61). Named by UK-APC after the M-29 Tracked Cargo Carrier, or "Weasel," manufactured by the Studebaker Corporation.

64°14′S 59°31′W / 64.233°S 59.517°W / -64.233; -59.517. A distinctive glacier, 4 nautical miles (7.4 km; 4.6 mi) long, flowing southward from Detroit Plateau, between Pyke Glacier and Eliason Glacier. Mapped from surveys by FIDS (1960–61). Named by UK-APC after the "Polaris" motor sledge made by Polaris Industries, Roseau, Minnesota, and used in Antarctica since 1960.

64°12′05″S 59°31′38″W / 64.20139°S 59.52722°W / -64.20139; -59.52722 An ice-covered peak rising to 1,302 metres (4,272 ft) high in the southeast foothills of Detroit Plateau. Situated between the upper courses of Eliason Glacier and Polaris Glacier, 8.85 kilometres (5.50 mi) west of Mount Hornsby and 4.82 kilometres (3.00 mi) east-southeast of Zasele Peak. Named after Laki, Plovdiv Province in Southern Bulgaria and Laki, Blagoevgrad Province in Southwestern Bulgaria.

64°15′S 59°25′W / 64.250°S 59.417°W / -64.250; -59.417. A glacier 5 nautical miles (9.3 km; 5.8 mi) long close west of Mount Hornsby, flowing south from Detroit Plateau into the ice piedmont north of Larsen Inlet. Mapped from surveys by FIDS (1960–61). Named by UK-APC after the Eliason Motor Toboggan, invented in 1924 and manufactured from 1924-1946 in the United States, then manufactured in Canada from 1947 to 1963, and used in Arctic Canada since 1950 and in the Antarctic since 1960.

Western features and nearby features, from south to north, include:

64°20′S 59°38′W / 64.333°S 59.633°W / -64.333; -59.633. A conspicuous steep-sided peak at the northwest corner of Larsen Inlet, immediately north of Muskeg Gap. Mapped from surveys by FIDS (1960–61). Named by UK-APC after Cletrac tractors made by the Cleveland Tractor Company, Ohio, the first to be used successfully in the Antarctic, by Admiral Richard E. Byrd's second expedition (1933–35).

64°19′11″S 59°38′31″W / 64.31972°S 59.64194°W / -64.31972; -59.64194 A rocky peak rising to 819 metres (2,687 ft) high at the northwest coast of Larsen Inlet. Situated west of the lower course of Albone Glacier, 6.1 kilometres (3.8 mi) north by east of Cletrac Peak. Named after the settlement of Dolen in Southwestern Bulgaria.

64°12′S 59°47′W / 64.200°S 59.783°W / -64.200; -59.783. A high buttress on the southern edge of Detroit Plateau, forming the west side of Albone Glacier. Mapped from surveys by FIDS (1960–61). Named by UK-APC after Wolseley Tool and Motor Car Company which, in 1908-10, designed the experimental motor sledge used by Captain Scott's 1910-13 expedition.