The south ridge, which is the west wall of Slagle basin and extends from Pk 13,330 to Pk 13,229, is class 2 with an easy, short class 2+ section to the summit. This section is better & firmer than the last short section of the route to the false summit from McCarty basin. (Note that there is a higher summit just north of 13,229 - 13,229 is on the USGS topo while the other peak doesn't have an elevation - it is ~ 13,290 by GPS.)
The ridge can be attained from Slagle Basin - head for the obvious attainable saddle between 13,290 and 13,330. (Note that on the summit register, the peak is named "Proposal Peak" - details in the register.) Slagle Basin is easily reached from McCarty Basin.
Thanks for the info. I will be out of town for the next few days. Will look at the map later to better understand what you are saying and will hopefully include your comments in the main text.