I think the exclusion (from DPS) is due to the relatively small elevation gain from Red Rock Pass.
I thought of that too - but there are other peaks like Nelson Mountain and Pleasant Mountain that have similar gains. Granted they don't have as many other peaks on the list right near by, but Thimble is a much better peak imo.
I'm not much of a list chaser anyhow, so I'm not too sure why I'm worried about it :)
I like your user name. We're planning on doing that peak in Dec - looks cool, I can't wait!
I think I'll climb this one sometime.
Thanks Dave! Hope you have a great time when you do!