Traversed ridgeline from Mt Tyndall. A giant boulder came down on Asaka's legs, and both her knees were bruised badly. She waited for me at the saddle. From the saddle I continued along the ridgeline, where climbing changed from hard class 3. From one pinnacle, there was no other way except to downclimb a class 4 chimney. I had no ropes so I took my time. I made it to the summit plateau and was surprised to see a summit register. Carefully retraced my steps back to Asaka and we headed back to Shepherd Pass.