Days Gone has a huge World Map. This page reveals the full in-game map in high resolution.
There are 6 Regions on the Map: Cascade, Belknap, Lost Lake, Iron Butte, Crater Lake, Highway 97.
Below you can find the full Days Gone World Map (In-Game Map):
*Click Map to enlarge*
This is a high-resolution version (2137 x 3340 pixels) that I cut together from many single screenshots of the uncovered in-game map.
You can click on the map image and zoom in to see all the icons of encampments, fuel stations etc.
By default there is a white fog covering the map. To make the fog go away you can either conquer the Ambush Camps or drive everywhere with your bike. Clearing the Ambush Camps is the recommended method.
You reach new regions as part of the story progress. You cannot access the full map from the start. After the story you can go back to all regions in free-roam to finish up remaining camp jobs, collectibles, and any other tasks. It’s important to note that there are temporary points of no return during the story but the whole map opens back up at the end of the game.