When I labeled it as 48, I had found a map that gave a number to every bike trail in Illinois. This was the site: http://www.idot.illinois.gov/travel-information/recreation/trails-paths-streets/index After looking over the map, I began to realize these numbers may have been given just to easily identify them on a map and were not officially signed numbers. And of course I've rode the Waterfall Glen Loop several times and have never seen any sort of markers with a 48 on it. You are allowed to remove it, that was my fault.