This slide on a NE aspect in mid White Pine Canyon off the PC ridgeline is visible on the slope left of the skier. I triggered this remotely when skiing down the gentle roll above it and to the right. I felt a large collapse and continued on down toward the top of No Name unaware that it released until I got farther down and looked back. I was about 150' away from the crown when it collapsed on a 5degree slope and propagated to the nearest steep slope. This photo was taken on the way back out the way we came in.