From the base of Isolated Peak, we had to trudge up tedious scree slope to a upper col, right of the rock pinnacles. Once you're on the slope, it gets foreshortened. Once on the col, a scenic ridge walk led us to the summit of Whaleback. Most people say Whaleback is a hike, but I don't think so. I think if the route involves scree slog, ie, loose stuffs, it cannot be called a hike. I had lots of trouble on loose ground when I started scrambling. Also, some route finding is required on the ridge. I stayed on the ridge crest and there're several moderate sections involved.
The walk back was pleasant and scenic. We were facing towards The Presidents for most of the time. Once getting into the trees, we had to use bug spray because of the mosquitos. Once we got back to camp, I wandered around to see where was Andrea's group, but couldn't find them... They showed up about 10min later. They went up via Iceline Trail, and didn't get to the camp until 3pm... Then they did Mt Kerr instead of Isolated Peak. We debated about which is the true summit of Kerr, but anyway, Mike and I would do both the two summits the next day, just to be sure.