Snowboarder, 5-Year-Old Dead After Collision at Boardistan
There's a bit more detail here. But I'll say this from years of living in resort towns parents are completely stupid with their kids on the snow like all sense of parental duty and preservation goes out the window. Almost crushed a kid today in Parklane at Breck when hitting a 30 foot jump.
None of the articles I've read so far say much about the circumstances other than the run has a "difficult" rating, which doesn't necessarily mean anything.
I don't know how much the kid's age or her mother's parenting skills should factor into this accident, as the mother in this story is an adult and she got clobbered too.