Well, what I'm working towards is to be able to knock off a ten mile walk in three hours or less. If I can do that four times a day for five days in a row while fasting the whole time, I will have proven something, at least to myself. With that in mind, here is todays walk, my first formal exercise walk in about a year.
An average speed of 3.6 mph, which makes more than 10 miles in three hours. I think this is doable.