Yongsan to Palddang, North on 45 to Geumnam-ri

Nice ride early in the morning, but I would worry about traffic picking up later in the day. I am looking for a way to make this a loop but have not found it yet. After you reach the end of the bike trail you will need to take a small road to a small underpass that will get you to the other side of highway 6. I would avoid riding on highway 6 too much traffic. I will mark this difficult only because it's 120km other than that no mountains to climb but there are a few good hills.