Cuesta Blanca, Aguascalientes?

I am currently working on my Pompa line out of Calvillo that has always been a mystery. One of those ancestors that suddenly appear out of nowhere. *Alien spaceship ancestors, as I call them* Would anyone know where Cuesta Blanca is? My Prudenciano Pompa came from there. He does have a sister that according to her marriage document states she was from Guanajuato. I have not been able to find neither of their baptisms. Their mother was a Hernandez from Aguascalientes, Aguascalientes. I have traced her line already as it appears I am now related to two Hernandez brothers.

Thanks