I've hiked along the wall of Geumjung Mt. fortress twice, and both times it's taken longer than I expected. Plan on half a day to do the walk from the South Gate to the North Gate, longer if you want to go up to the mountain at the far north end. There are fantastic views across Nopo-dong and the fortress interior (the 'fortress' itself is an entire valley) to be had from the Northern half of the wall. If you have time, climb the peak at the Northern end of the walk.
When I was there the path from the South to the East gate wasn't very well signed and was in pretty poor condition, with some very steep/narrow sections. I'd recommend visiting Beomeosa temple, then hiking the wall from North to South. The East to North gate section is wonderful, but it's a more fun trip if you can get to the South gate for the nearby cable car down before it closes!
Own or manage this property? Claim your listing for free to respond to reviews, update your profile and much more.