To Live and Die in LA...
The Valley Wastelands are the stretching point between the Hollywood Hills and the Northern Free States. Most importantly it includes the North Road in to Oakland/San Fran.
In other words it’s an open wasteland. The Sepulveda Pass includes bullet trains that are aggressively maintained by Knight Errant to the northern territories and the Tir, as well as Seattle and Portland and all points in between on the Native States.
The flat lands in between are a no mans land of nuk refugees, lost tribes and the worst of the castaways. In 2d vids it would be the gunslinger lands where the mutants cannibalize those who struggle to bring something from the land.