The northern half of the continent.
From western-most tip to eastern-most tip: 7,143 miles.
Westering Bay map, showing the location of the Wavedancer grotto and beach, the location of the holt, and the Troll Cliff Caverns.
The trolls actually have tunnels all throughout the cliffs on the northern side of the bays. The Wavedancers don't know they're there.
Distance from the Guardian Reef to the mouth of the river: 119.05 miles.
Distance between the holt the Wavedancer beach/grotto home is approximately 15 miles. That's about 2 hours away, by wolfback, at a wolf's normal traveling pace when he's not in a hurry.
