I\'ve rarely seen PI at the base of the cliff, and never on the wall itself...until last night. Was climbing City Lights yesterday after work and spotted a small tendril of the nasty vine on the ledge after the crux crack. There are some ferns and a bit of dirt there. Easy to avoid since it is still small, but just a heads-up for the sensitive. It could turn out to be Jersey creeper, which sometimes only sports 3 leaves on the tips of new shoots, but I don\'t think so. The 3 glossy reddish leaves had the right shape for PI.