Climbed this with Roper and Baldinger, who was a ranger at the time. Got in a bit of trouble with the Park Service on this one. Appears there were major complaints about "excessive and prolonged rock fall emanating from the area".
Having clambered over numerous terrains with Roper on many occasions I can well appreciate your fascination with the remote and obscure. I remember one hilarious time when we were lost in an area we had been numerous times. He wrote the friggin guide and we were lost.
Bertrand, let me know when you want to go I'm down. DrC still has some problems with THC, otherwise known as Technical Hummock Climbing. He will most likely be seen at the Alcove Swing with his cheap ass Mammoth Mammory brew 18 pk right along side the "Pony" Tennies.
from the Sentinel Rock/Sentinel Dome notch, a picture in profile from the west...
I, 5.5, Warren Harding and George Whitmore. June 1954. First free ascent unknown. Seen from Camp 4, this is the spectacular spire which appears to rise from the left skyline of Sentinel Rock, fairly near the top. Actually, the pinnacle is situated on a massif separated from Sentinel by an enormous gap. From Sentinel Dome drop onto the Pohono Trail and follow it west until it is possible to walk out toward Sentinel. A few dropoffs can be navigated 3rd class. After reaching the enormous gap, turn east and walk down a sloping ledge which ends in a notch just west of the spire. Climb easy rock for 40 feet, then work up and right around the south side of the rock. The last bit ascends shallow cracks on the east face.
Steve Roper Climber's Guide to Yosemite Valley page 211, 1971