This is the report from the Payette Avalanche Center about the accident :
Our thoughts and condolences go out to the families of two snowmobilers killed in an avalanche yesterday near Hard Creek, north of McCall. We don't have all the details of the accident yet, but what we can tell you is that the slide broke big for the terrain that it was in. The Crown or top fracture of the avalanche, near 7200ft, broke between 2 and 4 feet deep, was 200 to 300 yards wide, ran a vertical fall of approximately 350ft, deposited in a terrain trap, wide gully, about 130 yards wide and 15+ feet deep. Multiple snowmobilers were on a lower angle slope, below steep terrain, trying to free stuck machines. Multiple people were caught in the slide, the two victims were not wearing transceivers. The terrain that this slide occurred in was rather typical of our mid elevation area's with a large bouldery ground layer and fairly to sparsely treed northwest facing slope.
Current Avalanche rating is: Considerable