I was writing today and I was very happy that my character was finally on the move and there was going to be some action at last. I had been stuck for a while in this existential crisis with my main character where there is way too much of internal monologue and thoughts which I need to go back to later and edit some out and shorten. Long story short when I sat down today I really wanted to get the character, who is on the run, moving. So I began with her waking up, plan her journey and get going. Then she gets to a point where she needs to stop and decide how its best to proceed without being captured. That was all fine until I realised that I have no idea whether it is realistic for her to have travelled that distance within a day. I had actually not considered thinking of in detail (kilometers) How large her island is. I have no idea how long she has walked and that affects everything. What time it is, is she exhausted? does she need rest and water? She is going to be on the move for the vast majority of the story, I can´t believe I didnt think of this before. I had mapped out the cliffs, the forest, the harbours, farms even the most convenient trade routes. Now I realise that I need to figure out the size so I can map out her distance, what she is travelling. Both so I can make realistic travel plans for the characters. I don´t want a journey that should take a month to take a week for example. But also particularly as we begin on an island it´s briefly relevant how many medieval (sort of english) farms would fit in a certain space. Mainly my question is, is there any standard guideline of how long it takes a person on foot to travel a kilometre? (or any other form of measuring distance) of course I realise that it depends on the person and the terrain but is there any baseline that I can build on? and by horse?