This morning, as most mornings, I walk in the desert. I have had bobcat cross my path, coyotes, kit foxes, badgers etc., and I know puma are here but haven't seen one while walking but they're here. Today I saw, what appeared to be of the cat family, much bigger than a domestic cat, and not quite the size of a medium dog. I'ld say perhaps, 20 lbs plus. and solid black.
I looked up cats in the area and there seems to be no "varification" that black lions are in N. America. It was quick.