Vacation rentals in Harden Flat

I can’t find verifiable information about a city named Harden Flat, California. It may be fictional or a very small place not widely documented. Could you confirm whether Harden Flat is real, or share some details (county, nearby towns, notable features) so I can write a precise 2–3 sentence blurb? If you’re aiming for a generic, non-specific plug for a vacation rental, I can draft a neutral option right away.