Daegwallyeong (Hangul: 대관령; Hanja: 大關嶺) is a mountain pass in the Taebaek Mountains of eastern South Korea. It runs between Pyeongchang and Gangneung in Gangwon Province. It rises to 832 metres (2,730 ft) above sea level. It is an important historical pass that connects the regions of Yeongseo and Yeongdong. Daegwallyeong-myeon of Pyeongchang County is named after this pass. Daegwallyeong Museum is located in Gangneung.
This mountain pass was used for delivering agricultural and marine products from Gangneung to Yeongseo.
The Old Daegwallyeong way used to be one of the sections of Yeongdong Expressway. The highway has been turned into a local road, which helped reduce the traffic along the way. The Old Daegwallyeong way is 19.1km long. In the middle of the way, there is a divided way into a route that goes down all the way (1hr 50min), and another route that goes up to Daegwallyeong Museum or Gamagol Village (2hrs 20min).