Apart from gradually getting more tired, I really did feel pretty good until we reached the 'false summit' where there is a parking area and some restrooms. The true summit is probably less than half a mile beyond that, but I think that last section of road must be a little steeper, because as I rode that last bit I really started to feel the exhaustion after six hours on the road. My head's down now, just waiting for the end, and the road does actually look pretty steep there.