My body doesn't do well with altitude, if I hadn't lived the last 7 years in the mountain west, I don't think this hike would have been possible for me. Although many people hike straight to the top without stopping, I don't think I would have been able to. We hiked 4 or so hours, up to the tree line where there is a lake and meadow, I barely made it there, I got so dizzy near the end and found it challenging to keep my breathing regular. Luckily about 20 minutes before our hike finished for the day, we saw these mountain goats, we saw at least a dozen and it was quite cool.
It was weird I felt like we were traveling with a cult or something, like something out of Indiana Jones it was pitched black dark outside, and there were so many people hiking to the top that there was almost a constant line of flashlights all the way to the top.