Shining Rock by Blake Crouch
In “Shining Rock,” an older couple encounter a strange and menacing visitor during a camping trip in the North Carolina mountains. Friendly at first, this stranger seems to know them, seems to know their secrets, and as things escalate, they become convinced that they may never leave these mountains alive.
*Note: This story is collected with others in the eBook, FOUR LIVE ROUNDS, which also contains a Foreword by J.A. Konrath and introductions to each story by Blake Crouch.