On our 1981 Ptarmigan Traverse, Kim Colis and I climbed Sentinel by carefully working our way up the chossy west side. The weather was threatening. On top were a heavy ground rod, an angle iron piece and a heavy wall aluminum tube sticking up... the latter used presumably to mount the cameras or theodolites being used by the USGS to monitor the South Cascades Glacier. It appeared that the rods and tubes attracted quite a bit of lightning as the summit area consisted mainly of shattered rocks. The contents of the brass Mountaineers register were quite interesting. After noting that most of the entries mention beautiful weather (as compared to us) I copied a number of the entries as listed below...
Aug 3 '88
Ken Ohlsen, Glacier
Ed Bressler, Castle Rock
Harte Bressler, B'ham
Ptarmigan 50th Anniv Climb
for Dad (Tup) Calder Bressler
8/21/86
Dean Kurath, Richland, WA
Dome Yesterday Here Today
Dana Glacier was a bitch!
Aug 23 '84
Joe Pepitone NY Yankees
Norm Hodges
Whitey Ford
Brown Bombers Alpine Club