A national park on Leonida's northern border with hunting, fishing and off-road trails, and some colorful locals in the backwoods.
Rockstar Games
“A national landmark up against the state's northern border”
Mount Kalaga is the one region Rockstar has placed on a map, at least in words: it sits against Leonida's northern border. The park offers hunting, fishing and off-road trails, and Rockstar's description warns about the eccentrics living out in the backwoods.
Rockstar's navigation calls it Mount Kalaga; its screenshots and postcard use the full name, Mount Kalaga National Park.