I used to spend a lot of time running trails.
And — because I liked to explore new territory — I also spent a lot of time at unfamiliar trailheads staring at a map displayed on the parking lot kiosk, trying to memorize which trails to follow to run a loop. Once on the move it was hard to connect the image of the map in my mind with the actual terrain I was running through and make the correct decisions where trails crossed. I was fit enough back then that making a mistake and having to run a mile or two more than I’d planned usually wasn’t a problem, but nonetheless, I didn’t want to get lost.