Although, it really isn't much of a hike, but, Moro rock is a must see when you visit Sequoia. It is a nice and clean way to get a clear view of the seirras and the great western divide, without breaking too much of a sweat. A series of about 400 steps, leads you up to a vantage point that lets you see all the major peaks of the western sierras as well as the great western divide.
Notice the steps with the railings, below...
For me, this was particularly interesting because it helped me clearly see all the peaks, including the towering Alta Peak, that we were on top of, just a day before....