Routes to Dutasan peak from the Mureunggyegok valley.
Everything except for the valley requires a bit of scrambling, but nothing crazy. It’s a long hike though, and the wind chill in winter can be really freezing.
Battlerock route (fastest, red route)
Directly after bridge, go up to Battle Rock (45m)
Go to Three-way intersection or Samgeori
Then follow Dutasan peak
Fortress route (scenic, yellow route)
Valley for 2 km, then go up, just after a bridge, there is a sign
At the fortress, go to Three-way intersection or Samgeori. There is a waterfall on your right a few hundred meters after the fortress. That would take you back to the end of the valley (the 2 waterfalls known as Sang po po).
Detour option (scenic, blue)
From the Three-way intersection or Samgeori, you can go straight down to the valley via the fortress, or cross the waterfall and back to the end of the valley (the 2 waterfalls known as Sang po po).