The avalanche under Chimney Rock (north of Cooke City) was triggered by a sledder on Saturday, March 16. He was caught, pulled his airbag and not buried. This slope had hundreds of track on it throughout the winter. Tracks do not indicate stability, especially when we are dealing with a deep slab avalanche problem. The untracked face of Crown Butte has a similar snowpack structure and would be a dangerous choice to play on. Photo: GNFAC