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 , is the northwesternmost of the ridge's six main peaks. Its elevation was estimated at by a 1995/96 Bulgarian survey; the present figure was produced by a 2003 Australian GPS survey, and closely matched (as ) 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 in December 2016, making the peak lower than the adjacent St. Boris Peak (the latter's northernmost ice formation ‘The Synagogue’ rising to ) at that time. First ascent of the summit Mount Friesland by the Catalans Francesc Sàbat and Jorge Enrique from Juan Carlos I Base on 30 December 1991. The feature takes its name from Mount Friesland. Location The midpoint of the ridge is located at (UK Directorate of Overseas Surveys mapping in 1968, partial mapping by the Spanish Servicio Geográfico del Ejército in 1991, and Bulgarian mapping in 2005 from topographic surveys in 1995/96 and 2004/05). Maps L.L. Ivanov. Livingston Island: Central-Eastern Region. Scale 1:25000 topographic map. Sofia: Antarctic Place-names Commission of Bulgaria, 1996. S. Soccol, D. Gildea and J. Bath. Livingston Island, Antarctica. Scale 1:100000 satellite map. The Omega Foundation, USA, 2004. L.L. Ivanov et al. Antarctica: Livingston Island and Greenwich Island, South Shetland Islands. Scale 1:100000 topographic map. Sofia: Antarctic Place-names Commission of Bulgaria, 2005. L.L. Ivanov. Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2009. L.L. Ivanov. Antarctica: Livingston Island and Smith Island. Scale 1:100000 topographic map. Manfred Wörner Foundation, 2017. Notes References Friesland Ridge. SCAR Composite Gazetteer of Antarctica. Bulgarian Antarctic Gazetteer. Antarctic Place-names Commission. (details in Bulgarian, basic data in English) External links Friesland Ridge. Copernix satellite image Tangra Mountains Ridges of Antarctica