Shakadang Trail is also known as "Mysterious Valley Trail", which is named because more than 40 years ago a group of young folks entered the river valley and found it very secretive. This place has attracted more and more travelers, and thus everyone is used to calling it "Mysterious Valley". However, its name was reverted to "Shakadang Trail" in 2001, according to the name of the river. This trail is built along the river cliff so travelers can easily observe both the folded rocks and ecosystem beside the river shore. 4½ km after passing Sanjianwu (3D Cabin), the trail leads to an old Datong tribe village, which is a favorite of travelers. After the first curve, you can see running water from the cliff to the lake, a sight which has astonished many people. May is the season for You Tong flowers and makes the trail a pleasant floral walkway.