Azuris Path
This river is a major trade route ran and operated by the Tarrenbrooks.
Broadshore
This community of builders is a twin city to Farthorne. The two towns are separated by the river. Broadshore's construction teams built Farthorne University. Its expert craftsmanship has made the supplies and workers from Broadshore highly desirable. People travel to Broadshore to apprentice with Broadshore's workers.
Farthorne
In their working relationship with Broadshore, Farthorne provides access to some of the region's natural building supplies and the University creates useful and unique magic items.
Sullen Swamp
In the last century, the Fungi Coven has distinguished themselves as skilled sorceresses and herbalists who create highly desired tonics, tinctures, and potions, including the only consumable treatment for Manicsight.
Misty Hollow
To have access to the trade route, the Weaver's Guild built a town along the river. For most people observing the town, it's a standard religious town that worships the spider goddess, Malmi. Tucked away from the river in an unknown location, the Weaver's Guild built their western-most base location. Here, they store magic items and have their testing ground.
Traveller's Wood
As the last major trade-town before the forest's edge, Traveller's Wood is the last stop for wood-based building supplies on the trade route. It is also home to a large general store.
Aquafalls
The territory of Aquafalls is expansive. There dozens of farms that grow crops for their spinners and weavers to create premium fabrics. It is also home to the best costume designers on the Claw Continent. Mysura, the mayor of Windfield and Bardway, permits Aquafalls to trade on behalf of the Crafter's Claw.
Golden Meadow
The Den of Papyrus runs and operates the Golden Meadow. The Botanical Gardens flourishes here despite its sandy and dry climate. Due to the town's isolation, the organization's main artifact laboratory operates here.
I like the focus on trade and its impact on the area surrounding the river. The map is a nice touch too.