Phaedrus’ Mountain World?

…. “He would use this route to get into the high country, then backpack in from the road for three or four or five days, then come back out for more food and head back in again, needing these mountains in an almost physiological way. The train of his abstractions became so long and so involved he had to have the surroundings of silence and space here to hold it straight. It was as though hours of constructions would have been shattered by the least distraction of other thought or other duty. “

High In Mountains Along Beartooth Highway Red lodge, MT.
….(A better photo needed to show road from Red lodge, MT, and also illustrate the above passage from ZMM.)

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(Photo = 106-0676 ...... ZMM Page = 105 ...... WayPt = 125i. Photo at WayPt = 159w)