many years ago when I used to competing trail quests, I would cycle around an area markup all the paths and tracks on my OS map so I knew which were quick, which were slow, which were rocky and which were muddy. These days I rarely carry an OS map around with me but I do have my phone with various mapping apps on it. Is there an app that would allow me to make notes on the trail I am using and allow me to access it in some form of route planning site on my PC?