Mount Friesland in the context of "Perunika Glacier"

Friesland Ridge (Hrebet Frisland \'hre-bet 'fris-land\) is a ridge on Livingston Island in the South Shetlands, part of the Tangra Mountains. The summit, Mount Friesland, which rises to 1,700 metres (5,600 ft), is the northwesternmost of the ridge's six main peaks. Its elevation was estimated at 1,684 metres (5,525 ft) by a 1995/96 Bulgarian survey; the present figure was produced by a 2003 Australian GPS survey, and closely matched (as 1,702 metres (5,584 ft)) by the Bulgarian survey Tangra 2004/05.

The local ice relief is subject to changes, causing variations in the mountain peaks’ elevation. According to a Bulgarian GPS survey by D. Boyanov and N. Petkov the elevation of Mt. Friesland was 1,693 metres (5,554 ft) in December 2016, making the peak lower than the adjacent St. Boris Peak (the latter's northernmost ice formation ‘The Synagogue’ rising to 1,699 metres (5,574 ft)) at that time.

Tangra Mountains (in Bulgarian Тангра планина, 'Tangra planina' \'tan-gra pla-ni-'na\) (62°40′00″S 60°06′00″W / 62.66667°S 60.10000°W / -62.66667; -60.10000) form the principal mountain range of Livingston Island in the South Shetland Islands, Antarctica. The range had been nameless until 2001, when it was named after Tengri (Bulgarian Tangra), "the name of the ancient Bulgarian god."

Tangra Mountains are 32 kilometres (20 mi) long between Barnard Point and Renier Point, 8.5 kilometres (5.3 mi) wide, and are bounded by Moon Bay and Huron Glacier to the north, Huntress Glacier to the northwest, False Bay to the west, and Bransfield Strait to the southeast, and is linked to Bowles Ridge by Wörner Gap, and to Pliska Ridge by Nesebar Gap. The mountain is divided in three principal ridges: Friesland Ridge in the west, Levski Ridge in the centre, and Delchev Ridge in the east.

St. Boris Peak (Bulgarian: връх Св. Борис, romanized: vrah Sv. Boris, IPA: [ˈvrɤx svɛˈti boˈris]) is an ice-covered mountain rising to 1,700 m in Friesland Ridge, Tangra Mountains on Livingston Island in the South Shetland Islands, Antarctica. It is the first or second highest peak of both the mountains and the island along with Mount Friesland (1,700.2 m). The two are connected by a short saddle of elevation 1,649 m dominated by ‘The Synagogue’, a sharp-peaked rock-cored ice formation abutting upon the central summit of St. Boris Peak. The peak is also connected to Simeon Peak by Paril Saddle, and surmounts Huntress Glacier to the northwest and west, and Macy Glacier to the southeast.

The peak's central summit is rising to 1,685 m, while its highest point ‘The Synagogue’ rises to 1,699 or 1,700 m. The local ice relief is subject to change; according to a Bulgarian GPS survey by D. Boyanov and N. Petkov the elevation of Mt. Friesland was 1,693 m in December 2016, making St. Boris Peak the summit of both Tangra Mountains and the island in that season. According to the American high accuracy Reference Elevation Model of Antarctica (REMA), Mount Friesland is 8 m (26 ft) higher than the central summit of St. Boris Peak and 14 m (46 ft) higher than ‘The Synagogue’. However, according to the 2022 later edition of REMA Mount Friesland is 4 m (13 ft) higher than the central summit of St. Boris Peak and 7 m (23 ft) lower than ‘The Synagogue’.

Great Needle Peak (Bulgarian: Голям Иглен връх, romanized: Golyam Iglen vrah, IPA: [ɡoˈʎam ˈiɡlɛn ˈvrɤx]; variant name in Spanish: pico Falsa Aguja, lit. 'False Needle Peak') is the summit of the central Levski Ridge in Tangra Mountains on Livingston Island, Antarctica. Rising to 1,679.5 m, it is the third highest peak of both the mountains and the island after Mount Friesland (1700.2 m) and St. Boris Peak (1685 m). Great Needle Peak surmounts Huron Glacier and its tributary draining Devnya Valley to the north, Magura Glacier to the east, Srebarna Glacier to the south, and Macy Glacier to the southwest.

Huron Glacier is a 4.8 nautical miles (8.9 km; 5.5 mi)} long and 2.2 nautical miles (4.1 km; 2.5 mi) wide glacial flow on Livingston Island in the South Shetland Islands of Antarctica, situated east of Perunika Glacier, southeast of Kaliakra Glacier, south of Struma Glacier, west-northwest of Iskar Glacier and northeast of Huntress Glacier. It is bounded by Bowles Ridge to the north, Wörner Gap to the west and the Tangra Mountains to the south, receiving ice influx from several tributary glaciers draining the mountain's northern slopes between Mount Friesland and Helmet Peak, and running east-northeastwards to empty into Moon Bay north of Yana Point. Camp Academia is situated on upper Huron Glacier, in the northwestern foothills of Zograf Peak.

The glacier was named by the UK Antarctic Place-names Committee in 1958 after the American ship Huron (Captain John Davis) of New Haven, Connecticut, which visited the South Shetland Islands in 1820–21 and 1821–22.

Bowles Ridge (Bulgarian: хребет Боулс, romanized: hrebet Bouls, IPA: [ˈxrɛbɛd ˈbɔuɫs]) is the central ridge of eastern Livingston Island. The ridge extends 6.5 km in the east-west direction and is 1.5 km wide. The summit of the ridge is Mount Bowles which rises to 822m and is located 9.77 km northwest of Great Needle Peak, 6.08 km north by west of Mount Friesland, 8.77 km east-northeast of St. Kliment Ohridski base and 9.25 km south by west of Miziya Peak.

Bowles Ridge is bounded by Kaliakra Glacier and Struma Glacier to the north, by Perunika Glacier to the west and southwest and by Huron Glacier to the southeast and east. It is linked to Friesland Ridge of the Tangra Mountains by Wörner Gap, to Hemus Peak by Dimov Gate, and to Melnik Ridge by Yankov Gap. The ridge is crossed by Omurtag Pass and Pirdop Gate.

Pliska Ridge (Bulgarian: връх Плиска, romanized: vrah Pliska, IPA: [ˈvrɤx ˈpliskɐ]) is a three-peaked ridge rising to 667 m (2,188 ft) in eastern Livingston Island in the South Shetland Islands, Antarctica. Its central and highest summit, Pliska Peak, is located 2.48 km (1.54 mi) east-northeast of Willan Nunatak (449 m (1,473 ft)), 1.81 km (1.12 mi) southeast of Burdick Peak (773 m (2,536 ft), summit of Burdick Ridge), 3.53 km (2.19 mi) south-southwest of Mount Bowles, 3.68 km (2.29 mi) west-southwest of Kuzman Knoll, and 3.61 km (2.24 mi) northwest of Mount Friesland. The feature is 1.6 km (0.99 mi) long and 500 m (1,600 ft) wide, its axis trending due east-west, with precipitous southern slopes. It is ice-covered except for segments of its easternmost peak (646 m (2,119 ft)) and is bounded to the northwest by Orpheus Gate, to the north by the head of Perunika Glacier, to the east by Nesebar Gap, and to the south and west by the head of Huntress Glacier, the latter flowing 6 km (3.7 mi) southwestwards into False Bay.

First ascent by the Bulgarian Lyubomir Ivanov from Camp Academia on 18 December 2004.

Nesebar Gap (Sedlovina Nesebar \se-dlo-vi-'na ne-'se-b&r\) is a 1.3 km wide gap in eastern Livingston Island in the South Shetland Islands, Antarctica bounded to the west by Pliska Ridge and to the east by the northern slope of Mount Friesland, Tangra Mountains. It is part of the divide between the glacial catchments of Perunika Glacier to the north and Huntress Glacier to the south. The gap is part of an overland route between Orpheus Gate to the west, and Camp Academia locality and Lozen Saddle to the east.

The Nesebar Gap was first mapped in detail by the Spanish Servicio Geográfico del Ejército in 1991. Nesebar is the name of a town on the Bulgarian Black Sea Coast.