Personally, 6 miles is a really bizarre distance for me. I do not really know why, it just sort of feels odd. I guess 5 is just a nice, normal number that is half of ten, so it makes perfect sense for a distance to run that is short to medium roughly in length. 6 just feels way longer for absolutely no reason. And to me, anything 7 miles or greater kind of feels long. There is nothing wrong with the routes for 6 miles, I just sort of forget that they even exist