WorldwideSouth KoreaGwangju-si광남1동중원터널WorldwideSouth KoreaGwangju-si광남1동중원터널Cycling Climbs in 중원터널 There are 2 cycling climbs in 중원터널.Clicking on the climb category column will toggle between category and difficulty score.NameDistanceAvg GradientTotal ElevationClimb Category1.맹산 임도 2단계2.63 km3.9%119 mCat. 42.맹산 임도 우측 1단계 업힐2.54 km3.7%95 mCat. 4