BEHOLD, the map! Plus a bonus “this is where everyone is chilling” version.

The rivers are magically unaffected by the desolate winter surrounding them because they are used as the one and only method of travel for everyone.

• Humans, however, cannot travel by boat or swim the river for fear of being eaten by river inhabitants. They are forced to walk the river roads beside it. 
• There is an exception of one location at the bottom of the map where a river merges into the sea. Humans can safely ford this stretch without issue to get to the other side.

Dearest wanders the whole stretch of river it is placed at, but it cannot ford the gap where the river breaks into sea. 

While it’s possible to traverse the continent without following the rivers, it is highly dangerous. River roads are patrolled by ferrymen who guide travelers from one place to the next, and many will not accept jobs that depart from the mapped out paths.