The Colbert Mountains are an isolated mountain mass with several rounded snow-covered summits, the highest at 1500 metres (4,921.3 ft), overlooking Handel Ice Piedmont

Handel Ice Piedmont

Handel Ice Piedmont is a large ice piedmont lying north and west of Colbert Mountains, between Haydn Inlet and Schubert Inlet on the West-central coast of Alexander Island. Apparently first seen from the air by the United States Antarctic Service in 1940 but not separately mapped...

 between Haydn Inlet

Haydn Inlet

Haydn Inlet is an ice-filled inlet indenting the west coast of Alexander Island between Mozart Ice Piedmont and Handel Ice Piedmont. It is 27 nautical miles long and 12 nautical miles wide at the mouth, narrowing toward the head. First seen from the air and roughly mapped by the United States...

 and Schubert Inlet

Schubert Inlet

Schubert Inlet is an ice-filled inlet, 14 nautical miles long and 5 nautical miles wide, indenting the west coast of Alexander Island between the Colbert and Walton Mountains. Mapped from air photos taken by the Ronne Antarctic Research Expedition , 1947–48, by Searle of the Falkland Islands...

 in the west central part of Alexander Island

Alexander Island

Alexander Island or Alexander I Island or Alexander I Land or Alexander Land is the largest island of Antarctica, with an area of lying in the Bellingshausen Sea west of the base of the Antarctic Peninsula, from which it is separated by Marguerite Bay and George VI Sound. Alexander Island lies off...

. It was first seen and photographed from a distance by Lincoln Ellsworth

Lincoln Ellsworth

Lincoln Ellsworth was an arctic explorer from the United States.-Birth:He was born on May 12, 1880 to James Ellsworth and Eva Frances Butler in Chicago, Illinois...

 on his trans-Antarctic flight of November 23, 1935, and partially mapped from these photos by W.L.G. Joerg. It was resighted and photographed from the air by the United States Antarctic Service, 1939–41, and by the Ronne Antarctic Research Expedition

Ronne Antarctic Research Expedition

The Ronne Antarctic Research Expedition was an expedition from 1947-1948 which researched the area surrounding the head of the Weddell Sea in Antarctica.-Background:...

 (RARE) 1947–48, under Finn Ronne

Finn Ronne

Finn Ronne was a U.S. Antarctic explorer.-Background:Finn Ronne was born in Horten, in Vestfold county, Norway. His father, Martin Rønne , was a polar explorer and served in Roald Amundsen's successful expedition to the South Pole...

, who named it for R. Admiral Leo O. Colbert, head of the U.S. Coast and Geodetic Survey, which furnished equipment for the expedition. It was remapped in detail from RARE air photos by D. Searle of the Falkland Islands Dependencies Survey in 1960.