I've found snowboarding to be an amazing activity to partake in alone. I'll take a mid weekday off and drive to Tahoe (I live in CA) and most resorts dont have lines at the lifts.

At my own steady pace, I'll get somewhat lost in the woods. Total silence and just the trees and snow. Maybe sit down and take it all in. I find these trips to be the best vacations and often I don't stay more than a day.