
Leonida Keys
A tropical archipelago where life is easy and the water is not.
Overview
The Keys run south off the tip of the state through Mariana County — Rockstar's version of the Florida Keys. Life in the archipelago is unhurried and cheap, which is precisely why it sits on the doorstep of some very dangerous water: this is smuggling country, and it is where Jason ended up.
Sources
Rockstar Newswire — Official character bios, region descriptions and screenshot releases.
Related

Grassrivers
Wetlands, airboats, and predators of several kinds.

Cal Hampton
Jason's friend, happiest indoors with a scanner and a beer.

Jason Duval
One of two protagonists. Wants an easy life and keeps not getting one.

Brian Heder
A classic Keys drug runner from the golden age of smuggling.

Leonida
The state the game is set in — Rockstar's take on Florida.