We skied the Mid Ivory gully line then skinned back up to ski Montreal Hill down to the Cardiff mine: 40-50 cm low-density HST over MFCr, no slab formation in areas skied, observed one Sr SSL size 1.5 on cross-loaded/wind-pressed convex terrain feature on High Ivory (probably occurred around 10:00 am) - photo attached, see avalanche obs. We dug a snow profile adjacent to the avalanche but found no slab in the profile location. Few small (size 0.5) LD observed in the trees at BTL elevation above the road on the way up. Greenhousing began to affect the top 20 cm at TL elevation around 1:30 pm. No Na observed, no Sc, no cracking, no whumpfs.