The Grassrivers is the vast wetland region that occupies the southern interior of the fictional State of Leonida in Grand Theft Auto VI. Described on the official Rockstar promotional website as "the untamable jewel of Leonida's crown", the area is a flooded grassland of mangroves, sloughs and slow-moving rivers, populated by alligators, flamingos and human inhabitants ranging from eccentric swamp-dwellers to commercial operators of airboat tours (Rockstar Games, 2025; GTA Wiki, 2026). The region is the in-game analogue of the Florida Everglades and draws its name from Marjory Stoneman Douglas' seminal 1947 book The Everglades: River of Grass, a literary inspiration acknowledged by the fan and journalistic community alike (GTA Wiki, 2026). This report compiles what is presently known about the Grassrivers from leaks, the first two trailers, the promotional website, and from real-world ecological and geographical parallels to the Everglades that allow informed projections of its in-game representation. It then explores likely gameplay possibilities, watercraft, and wildlife so that the region can be situated within the wider design of the game's world.
The Grassrivers occupies the southern portion of Leonida, stretching through Vice-Dale County and Mariana County, and forms the natural buffer between the urban coast of Vice City and the more rural interior to the north (GTA Wiki, 2026). Fan-led cartography drawing on the first two trailers and screenshots places the Grassrivers in the south-central band of the map, with the town of Watson Bay sitting along its margins and the Leonida Department of Corrections positioned between Watson Bay and Hamlet, suggesting that the wetlands abut several institutional and small-town settlements (Wilson, 2025). The terrain is characterised by sawgrass prairies, sloughs, hardwood hammocks and mangrove fringes, and the official screenshots released on Rockstar's promotional site depict expanses of grassy water punctuated by stilted shacks, jetties and dilapidated wooden boardwalks (Rockstar Games, 2025).
The Grassrivers is unmistakably modelled on the Everglades, the 7,800 square-mile flooded grassland that spans the southern third of the Florida peninsula (Wikipedia, 2026). The Everglades begins near Orlando with the Kissimmee River, discharges into the shallow Lake Okeechobee, and during the wet season produces a slow-moving sheetflow up to 60 miles wide that creeps southward across a limestone shelf towards Florida Bay (Wikipedia, 2026). Marjory Stoneman Douglas famously christened this body the "River of Grass" in her 1947 work, a phrase that the Grassrivers name explicitly echoes (GTA Wiki, 2026). Like its inspiration, the Grassrivers is portrayed in trailer footage and screenshots as a primordial expanse in which the boundary between river, marsh and prairie is blurred, a depiction consistent with the Everglades' actual hydrology where vertical gradient is roughly two inches per mile and water may take months or years to travel from the lakes of the interior to the sea (Wikipedia, 2026). The educational interpretive sign titled "Energy in the Grassrivers", first surfaced in the September 2022 leaks, indicates that Rockstar intends to simulate not only the visual character of the Everglades but also its food web and ecosystem services in some form of in-world signage and lore (GTA Wiki, 2026).
The Grassrivers' physical character invites a distinctive style of gameplay markedly different from the urban density of Vice City. The region is plausibly the setting for fugitive missions, drug-running, alligator-poaching, fishing tournaments and ecological tourism, all of which find precedent in real Everglades culture and in earlier Rockstar games such as Grand Theft Auto V's Blaine County and Red Dead Redemption 2's Bayou Nwa. Speculative mapping work indicates correctional facilities such as Leonida Department of Corrections and Leonida State Prison sit near the wetlands, hinting at prison-break missions or escapes through the swamp (Wilson, 2025). Watson Bay, identified as a Grassrivers community, is positioned to act as a service hub for boat hire, bait shops, roadside diners and shady fixers (GTA Wiki, 2026). The wider GTA VI design philosophy described in press coverage and developer commentary suggests that the wetlands will host both scripted set-pieces and emergent activities, with the airboat already confirmed as a usable vehicle in trailer one (Wilson, 2025; GTA Wiki, 2026).
Among the most evocative confirmations from the first trailer is a shot at the 0:19 mark depicting an airboat, described by the GTA Wiki as a "Panther-inspired" design, skimming across a Grassrivers slough (GTA Wiki, 2026). Airboats — flat-bottomed craft propelled by an aircraft-style pusher propeller and rudder — are the de facto vehicle of the real Everglades because their absence of a submerged drive train allows them to traverse mats of vegetation and shallows that would foul a conventional outboard. Their inclusion strongly implies that the Grassrivers will be navigable as a coherent water network, with sawgrass and mangrove channels passable in airboats while requiring portage or alternative routing for jet-skis and motor launches. Beyond the airboat, the broader watercraft roster in Grand Theft Auto VI is expected to include skiffs, fan-driven swamp boats and possibly canoes, and the region's interconnection with the coast suggests that smugglers might use the Grassrivers as a back door into Vice City harbour districts. The marshes' shallow draft also creates opportunities for unique vehicle handling models, with airboats outclassing pursuit vessels in the vegetated interior but vulnerable in open water.
The fauna of the Grassrivers, as previewed in the first trailer at 0:20, includes a large flamboyance of flamingos and multiple alligators, both of which are iconic Floridian species (GTA Wiki, 2026). Rockstar's promotional copy warns players that "the gators may be the most famous attraction, but there are far deadlier predators and weirder discoveries among the mangroves", language that implies an expanded predator roster potentially incorporating Burmese pythons (an invasive species notorious in the real Everglades), American crocodiles, bobcats and the occasional Florida panther (Rockstar Games, 2025; Wikipedia, 2026). The Everglades supports sawgrass marshes, tropical hardwood hammocks, pinelands, cypress strands, mangroves, coastal prairie and the brackish Florida Bay ecotone (Wikipedia, 2026), and the Grassrivers' visual heterogeneity in screenshots suggests Rockstar has modelled several of these biomes. Birdlife is likely to be lavish: in addition to flamingos, players can reasonably expect great blue herons, roseate spoonbills, anhingas, ospreys and wood storks, all native to the Everglades ecosystem. The presence of wildlife is more than decorative — earlier titles in the series have used animals as both ambient detail and gameplay challenge, and the Grassrivers' predators are likely to pose a genuine threat to careless players who leave their airboats.
The Grassrivers Region is shaping up to be one of the most distinctive environments in Grand Theft Auto VI, blending fidelity to the real Everglades with Rockstar's customary satirical edge. It situates the player within a slow-moving river of grass that contrasts sharply with the neon density of Vice City, offers a meaningful vehicular niche in the airboat, and presents a rich ecosystem of charismatic and dangerous fauna. While the official map and mission structure remain under embargo until the 2026 launch, the available evidence — promotional screenshots, leaked interpretive signage, trailer footage and informed cartographic reconstruction — converges on a vision of the Grassrivers as both a credible wetland simulation and a stage for the criminal mischief that defines the series. Players should expect the Grassrivers to function as more than scenic background: it is likely to be a key cultural, ecological and operational zone in the State of Leonida.
GTA Wiki (2026) Grassrivers. Fandom. Available at: https://gta.fandom.com/wiki/Grassrivers (Accessed: 14 May 2026).
Rockstar Games (2025) Grand Theft Auto VI: Grassrivers. Promotional website. Available at: https://www.rockstargames.com/VI/grassrivers (Accessed: 14 May 2026).
Wikipedia (2026) Everglades. Available at: https://en.wikipedia.org/wiki/Everglades (Accessed: 14 May 2026).
Wilson, I. (2025) 'All of the GTA 6 map that's been pieced together so far', GamesRadar+, 17 July. Available at: https://www.gamesradar.com/gta-6-map/ (Accessed: 14 May 2026).
Douglas, M.S. (1947) The Everglades: River of Grass. New York: Rinehart & Company.