Hong, Sung Taek (Korean: ???; Hanja: ???; born 13 March 1966) is a mountaineer, adventurer, explorer and author from South Korea.
He is currently a National Geographic Explorers supported by a National Geographic explorers program and also associated with Defytime and a principal of KSAF Mountaineers Academy.
He is renowned for reaching all the Three Poles and crossing the Bering Strait and Greenland for the first time.
He summited Everest in 1995, skied to the South Pole in 1994 and walked to the North Pole in 2005.
He also crossed Bering Strait by foot in 2012 (official) and crossed Greenland by dog sledding in 2011.
He was thus the first in the world to reach all the five poles (Everest, North and South Poles, Bering Straits, Greenland).