The wetland belt inland from the coast — a flat expanse of sawgrass, channels and hammocks where the road network thins out and boats start to make more sense than cars.
In the game
Sawgrass, airboats and slow water
Real-world basis
The Everglades
Name
Confirmed by Rockstar
Rockstar names Grassrivers but has never stated what it is based on. The comparison above is our reading of official footage.