Let’s emulate Greta Garbo’s famous line:
What’s the longest you’ve ever been truly alone — without any human contact?
That would be in July 1974 when I was on a six-week backpacking NOLS course in the Uinta Mountains of Utah. At the end of the course the leaders broke us up into groups of four and sent us off back to the pickup point. On the way I spent 24 hours by myself on the shore of an unnamed lake somewhere above tree level. I fished, I wrote in my journal, and enjoyed the solitude, but I was also glad to see my fellow campers when the day was over.