From: http://chrisinsouthkorea.blogspot.com/2010/01/january-2010-events.html

January 9-31: Hwacheon Sancheoneo Ice festival - the first area that freezes over in winter, and claiming some of the thickest ice in Korea, over a million visitors will visit this festival over its three weeks. Also known as the Nara Festival. Sancheoneo means mountain trout, which supposedly only frequents the coldest and purest waters in the country. This is the place to try ice fishing with your bare hands - not quite the Polar Bear Plunge, but still something quite daring by nature. Get to the Hwacheon bus terminal via the Dong Seoul bus terminal in east Seoul (Gangbyeong station, line 2), or go with the Adventure Korea group to pay one price and have all the transportation and other things taken care of.