I was up this peak a couple of times in the past. The hike from near the end of the Granite Hot Springs road is a nice off-trail walk. The last time there was one of those days when it was sooo green that it seemed unreal. I saw what must have been a bear den part ways up. It was a massive hole dug into the side of the mountain that was huge and had to be too big for anything smaller then a bear.
At different times in the late '90s I have been to all three of these points, the true Terraced Peak twice. The little Point 10,405 I think is the least climbed and maybe most interesting. You should climb it just because few have ever done it!