A beautiful and mysterious valley located 12 km up the Donggang River, Eorayeon Valley is renowned for its clean waters and for the many fish that inhabit it. The valley has beautiful rock formations and a dense pine forest that were designated as the National Scenic Spot in December 2004. It is one of Korea's most popular sites for rafting, followed by Naerincheon Creek and Cheorwon's Hantangang River. The trail to Eorayeon through Jatbong Peak is also quite popular (approx. 3 hours).