Climbing and access information for this formation is on Page 169 of the book.
This formation was first climbed by Fred Beckey and Louis Stur in 1961. To my knowledge, there have been no other published accounts of ascents of Rotten Monolith. I suspect that it may have only been climbed once. USGS Mount Cramer
Rotten Monolith as viewed from Mount Iowa.
There are a number of potential lines on this 500-foot face. While Beckey and Stur encountered rotten granite, it appears that this face has better rock.
This view is looking up toward the cirque below Braxon Peak. Braxon Peak is on the left and its East Ridge runs from the summit (top right) down to the left. Rotten Monolith sits behind the ridge, farther to the north.
Rotten Monolith as viewed from the summit of Braxon Peak. This photo shows the West Face climbed by Beckey and Stur in 1961.