Hex Map

This page details how to measure distances using a hex map with the scale of 30 miles from one flat edge to the opposite edge.
For the purposes of the game, travelling a side at just over 17 miles will take roughly 5 hours of journey time. Taking the long diagonal will take 9 hours of travel time instead of the usual 8 to cross a hex.
Refer to the chart for average times and lengths in-game and always remember rough estimates are very much okay to use.
The terrain will affect your travel times and as a good rule of thumb, anything considered difficult terrain will likely take twice as long depending on the weather conditions. Some tasks can take a much longer time such as scaling a mountainside or cliff.