The source of Yongchu Falls, Mount Yeoninsan (연인산) stands at 1,068 meters above sea level and features soft terrain and beautiful scenery. Local folklore has it that those coming to the mountain wishing for true love will have their dreams come true.

The soil of Mount Yeoninsan is fertile, offering a great natural environment for a variety of flowers and trees. Numerous types of wild flowers thrive from early spring to late autumn. The trail connecting Mount Yeoninsan with mounts Myeongjisan, Cheonggyesan, and Gwimokbong remains relatively unspoiled by human influence: cooking and camping in the area is strictly forbidden. All the mountains in the trail are over 1,000 meters high. A defining feature of Mount Yeoninsan is the royal azaleas that bloom in late May. The County of Gapyeong celebrates the royal azalea by hosting the Mount Yeoninsan (Natural Ecology) Festival in May of each year.

Also ideal for hiking, Mount Yeoninsan offers a number of trails: one starts from Buk-myeon in Baekdun-ri, one from Mail-ri, and one from Yongchu Valley. With a minimum of climbing, hikers can take in a variety of scenic views, ranging from the bloom of the royal azaleas in the spring to the beauty of the changing leaves in the fall.