A lot depends on the terrain and the condition of the trail/road. (Pavement does tend to be a bit harder on your feet than a nice dirt trail.)
25km (~15mi) per day on level terrain on a path in good condition is a good walk but not anything exceptional. If there are ups and downs and the trail is rock and rough that's a whole different story.
25km (~15mi) per day on level terrain on a path in good condition is a good walk but not anything exceptional. If there are ups and downs and the trail is rock and rough that's a whole different story.