The Grassrivers region (the equivalent of the Florida Everglades in the GTA universe) represents the wild and ruthless reverse of Vice City’s night life. This immense mosaic of swampy water, impenetrable mangroves, and rivers of grass is one of the most atmospheric and technically complex environments ever modeled by Rockstar Games.
Below, we break down everything you need to survive and dominate this dangerous biotope in Grand Theft Auto VI.

1. Swamp Topography: an unpaved labyrinth
Moving through Grassrivers requires completely changing the urban driving mindset:
- Shallow rivers of grass: Water surfaces barely half a meter deep where any conventional car will stall or get stuck in the mud.
- Mangrove tunnels: Natural passages vaulted by aerial roots that prevent tracking by police helicopters, making them the best escape route after a criminal heist.
- Firm mud islets: Small land elevations where clandestine camps and undeclared light aircraft landing strips are located.
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2. Lethal Fauna and Leonida’s Dynamic Ecosystem
Inheriting the advances in biological artificial intelligence from Red Dead Redemption 2, the Grassrivers swamps harbor an active food chain:
- Leonida Alligators: Reptiles of varying sizes that rest on the banks during daylight hours and hunt stealthily at dusk. They can attack light airboats if you pass too close.
- Water Snakes and Amphibians: Poisonous species that complicate wading on foot through the undergrowth.
- Flocks of wading birds: Flamingos, herons, and spoonbills that take flight in a stampede upon hearing the roar of airboat engines, alerting nearby NPCs.
3. Specialized Vehicles for the Swamp
| Vehicle | Advantages in Grassrivers | Disadvantages |
|---|---|---|
| Airboat | Top speed in shallow waters, passes over mud without slowing down | Zero protection against gunfire, very noisy engine |
| Monster Truck / Lifted 4x4 | Crushes vegetation, armored cabin | Slow when crossing deep channels |
| Jet Ski (Seashark) | High agility in clear channels | Can run aground on mud banks |
| Military Hovercraft | Fully amphibious, support for heavy weaponry | Large turning radius, high consumption |
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4. Explore Grassrivers’ Coordinates
You can locate all the swamp entrances and airboat ports on our interactive map of Leonida or follow the hunting and gathering strategies in the GTA 6 guides.