The Baekdudaegan is a mountain range and watershed-crest-line which runs through most of the length of the Korean Peninsula, from Paektu Mountain in the north to Jirisan in the south. It is important in traditional Korean thought, a key aspect of Pungsujiri philosophy and practices. It is often referred to as the spine of the Korean Peninsula, and depicted in various historic artworks. It incorporates the Sobaek mountain range and most of the Taebaek mountain range.