Grassrivers is the fictional wetland region of Leonida in Grand Theft Auto VI, drawing direct inspiration from the real Everglades of southern Florida. Where Leonida parallels Florida as a sun-bleached, swampy peninsula, Grassrivers stands in for Everglades National Park and its surrounding wilderness: a slow-moving "river of grass," a haven for alligators, smugglers, exiles, and ramshackle airboat operators. This report examines the real Everglades and outlines how its geography, ecology, human history, and cultural mythology inform the design and storytelling of Grassrivers.
Everglades National Park protects the southern twenty percent of the original Everglades wetlands in Florida, covering roughly 1,508,976 acres (about 2,357 square miles) across Miami-Dade, Monroe, and Collier counties (Wikipedia, 2025a). It is the largest tropical wilderness in the United States and the largest wilderness of any kind east of the Mississippi River, and it ranks as the third-largest national park in the contiguous United States after Death Valley and Yellowstone. Authorized in 1934 and formally dedicated in 1947, it is one of only three sites worldwide listed as a UNESCO World Heritage Site, a UNESCO Biosphere Reserve, and a Ramsar Wetland of International Importance (Wikipedia, 2025a).
Unlike national parks created to preserve dramatic geological features, Everglades was the first U.S. park established explicitly to protect a fragile ecosystem (Wikipedia, 2025a). The National Park Service recognises nine interdependent ecosystems inside the park, including freshwater sloughs, marl prairies, tropical hardwood hammocks, pine rocklands, cypress domes, mangrove forests, coastal lowlands, and marine and estuarine zones (National Park Service, 2025). The mangrove system in the park is the largest continuous mangrove ecosystem in the Western Hemisphere, and the park is the most significant breeding ground for tropical wading birds in North America (Wikipedia, 2025a).
The Everglades is fundamentally a slow river. Water leaves Lake Okeechobee in the wet season and forms a sheet of fresh water 60 miles wide and over 100 miles long, creeping southward across a porous limestone shelf at roughly 0.25 miles per day toward Florida Bay (Wikipedia, 2025b). The vertical gradient from Okeechobee to the bay is only about two inches per mile, producing the phenomenon called sheetflow that gave the region its enduring nickname, the "River of Grass," coined by Marjory Stoneman Douglas in her 1947 book of the same title (Wikipedia, 2025b).
Elevation rarely exceeds eight feet above sea level, with the highest point in the natural region reaching only about 25 feet (Wikipedia, 2025b). The bedrock is permeable Miami Limestone and Fort Thompson limestone, which store water and recharge the Biscayne Aquifer, the primary fresh-water supply for the Miami metropolitan area (Wikipedia, 2025a).
The Everglades sits at the transition between subtropical and tropical climates, with a wet season from May to October producing roughly 70 percent of annual rainfall, often through afternoon thunderstorms, and a dry season from November to April that can be punctuated by drought, wildfire, and tropical cyclones (Wikipedia, 2025b). Approximately 57 inches of rain fall annually at Royal Palm Ranger Station.
The park supports 36 federally threatened or protected species, including the Florida panther, American crocodile, and West Indian manatee, alongside roughly 350 bird species, 300 fish species, 40 mammal species, and 50 reptile species (Wikipedia, 2025a). American alligators dominate freshwater sloughs and dig "alligator holes" that sustain fish and amphibians through the dry season, while mangrove coasts nurse 220 fish species and shelter sea turtles, manatees, roseate spoonbills, and brown pelicans.
Humans have inhabited the southern Florida peninsula for around 15,000 years. The Calusa and Tequesta tribes dominated the region before Spanish contact; the Seminole, formed largely from displaced Creek peoples, retreated into the Everglades during the Seminole Wars of the early 19th century and successfully resisted forced removal (Wikipedia, 2025b). Drainage proposals began in 1848, and large-scale canal construction in the early 20th century — culminating in the Central and Southern Florida Flood Control Project of 1947 — built 1,400 miles of canals and levees, diverting water to fuel the explosive growth of Miami and converting roughly half of the original Everglades into agricultural and urban land, much of it sugarcane fields (Wikipedia, 2025b). Today the park faces threats from water diversion, agricultural nutrient runoff, urban encroachment, sea-level rise, saltwater intrusion, and invasive species such as Burmese pythons and melaleuca trees. The Comprehensive Everglades Restoration Plan, approved in 2000, remains one of the most ambitious and politically charged environmental restoration efforts in history.
Grassrivers translates the Everglades into Rockstar's parody of Florida with a high degree of fidelity to the real region's defining features:
In short, Grassrivers is less an invention than a translation: a compression of Everglades National Park, the Big Cypress Swamp, the Ten Thousand Islands, and the Florida Keys backwaters into a single satirical wilderness that lets GTA VI exploit Florida's most mythic and most ecologically distinctive landscape.
National Park Service (2025) Nature - Everglades National Park. Available at: https://www.nps.gov/ever/learn/nature/index.htm (Accessed: 14 May 2026).
Wikipedia (2025a) Everglades National Park. Available at: https://en.wikipedia.org/wiki/Everglades_National_Park (Accessed: 14 May 2026).
Wikipedia (2025b) Everglades. Available at: https://en.wikipedia.org/wiki/Everglades (Accessed: 14 May 2026).
Douglas, M.S. (1947) The Everglades: River of Grass. New York: Rinehart & Company.