The TK Trail, also known as the Tamsui-Kavalan Mountain Trail, is a historic mountain road that encapsulates the rich history of Taiwan. It was the main route connecting Tamsui Hall in northern Taiwan with Kavalan Hall in eastern Taiwan. The routes can be generally divided into three road networks: north, central and south. Historical Official Trail toward Kavalan (入蘭正道) comprises part of the north network.
淡蘭古道，又稱淡蘭百年山徑，是清朝時期北部「淡水廳」至東部「噶瑪蘭廳」間往來的路線。其概可分為北、中、南三大路網。入蘭正道為北路（官路）的一部份，連接瑞芳和大里，包含金字碑古道及草嶺古道路段。