Erebor is NW, downhill, and then W from Riddle. There are three routes that I know of on this rock. A 12+ project that may be unfinished, Three Rings for Elven Kings and Misguided Youth, which shares the start with 3 rings. Instead of going right at the pod, go left, run it out for around 100 feet and hook up with the bolts at the top of 3 Rings. This route is 5.8, vs.