TNBYY Ultra (previously known as TNBYY Dayhike Challenge) is an ultra trail challenge nestled in the Northern part of Titiwangsa Range with majestic views of the mountain range of 7,000 feet above the sea. The acronym stands for “Tok Nenek Bubu Yong Yap” (TNBYY) and makes reference to the iconic Mount Tok Nenek, Mount Bubu and Mount Yong Yap where