Off the Beaten Path - Korean Countryside Bike Trip Ideas

The Han River trail is great. The Seoul to Busan trail is amazing. The Four Rivers Trail is breathtaking. So, what do you do when you've done all of those? Maybe you're just looking for a nice day trip outside of Seoul. There's a bunch of country trails that are worth checking out. Here is a list that I am currently using to plan future countryside trips:

(above: Chilseon Valley (칠선계곡) near Jirisan National Park (지리산국립공원))  

(above: Wonju Rail Park (간현원주레일파크). Photo credit: Life Outside of Texas)