Gwanaksan station subway line 1. Exit 2 and then cross the road and take bus 6-2 or 20 to Kyeong in yo dae (university). Walk up road towards park for 500m. At car park veer left into park and travel along road for 50m before taking a trail across the stream bed. cross another stream bed and then walk alongside the stream slightly uphill. After 15 mins you see some blue chinese characters painted on rocks. Pass by these a few metres and you find a trail to the left. The crag is 5 mins up this left trail.