Departed vehicles parked on Highway 97 around 10am and headed south up the drainage and eventually up Diamond Head. Gained the ridge below the peak and opted not to go to the top due to exposed slop and angle. Dug a pit on the East facing aspect at around 5,500'. Pit showed a weaker layer at 6-8 inches down as well as ~36 inches down. Column test suggested the layers were well bonded with the top layer being the least bonded. Shoulder high compression for layer to collapse. During our ski out, both on Diamond Head and then up and over Windy Knob, there were no signs of instability even in areas with some wind transport.