[Image: http://www.guildwarsinsider.com/backend/wp-content/uploads/2012/06/World-of-Tyria.jpg]
To give you a sense of scale, the top colored map is Guild Wars 2's current playable map.
[Image: http://wiki.guildwars2.com/images/1/18/2012_February_Tyria_map.jpg]
Takes maybe an hour or two to run across Ascalon in the above map.