Find a side door

You decide to find a side door, the front entrance will be the one the dragon guards. Riding around the castle you find a small but locked door at the back wall. You also see some loose stones on the right side wall these could be turned into ledges to climb up the wall. It is clear that you can ride no further.

You ride back round to the front and leave your horse tied up by the front gate. If things go wrong you will need a quick getaway so you use a quick release knot. You walk back around the castle...