There's a thread about this on a Colorado Reddit group and the locals are saying he lacked distance, hit the guard rail then got run over...
https://www.cbsnews.com/colorado/news/berthoud-pass-summit-grand-county-ski-death-highway-40/
https://www.cbsnews.com/colorado/news/berthoud-pass-summit-grand-county-ski-death-highway-40/