Is the US National Parks Pass valid at State Parks as well?

I’m planning a 2 week camping road trip to the western United States where we plan on staying at a good number of National and State Parks. We’re thinking of purchasing the America The Beautiful – National Parks And Federal Recreational Lands Pass. Does anyone know if this will be honored at State Parks as well or only the National ones?

No. State parks are run by the various states. That’s their piggy bank, and they don’t want to have to share that revenue stream with DC.