What is "midmountain"

Usage examples of "midmountain".

We had hiked twenty-two miles in two days—a highly respectable distance for us—but a distinct listlessness and sense of anticlimax, a kind of midmountain lassitude, had set in.

We had hiked twenty-two miles in two days--a highly respectable distance for us--but a distinct listlessness and sense of anticlimax, a kind of midmountain lassitude, had set in.