"Hi Toby, I saw you had written about the boss canyon avalanche, I saw the slide path last Saturday 2/17 and figured someone had reported it. I have pictures below. As you can see it was fairly large and near the slope by the safety shelter. Looks like it was remotely triggered on the north end on the ridge top and fractured along the cliff edge judging by the snowmobile tracks and where the slide started. Let me know if the links don't work. Hopefully this helps"