>The rise of 'backcountry' into prominence roughly corresponded with the rise of Backcountry as a retailer. In 2006, ski touring was called 'randonee' as often as it was called 'backcountry'

'Backcountry' to describe non-resort skiing/boarding has been in use since at least the early 90's. Probably earlier. I've literally never heard anyone say the word 'randonee' in North America. Not once.

Source: I worked in the industry for more than two and a half decades.