Portland, Oregon was chosen for many reasons. The base idea of the Frontier was to construct a completely new environment from the Mojave Desert and Capital Wasteland.
However, due to a plethora of potential bugs, we strongly suggest you create a new save for playing the Frontier, to minimize potential errors. You visit the Frontier as the courier, the Frontier takes place in the same time span as the vanilla DLC’s. Fallout the frontier can now be downloaded on Nexus Mods Can I use my existing FNV character to play the mod? Do you go to the Frontier as the courier?