It just seems too much of a coincidence.
From the article: "Mankin said Lopes went inside her daughter's former home, also in Emerald Heights, Thursday morning, but the current resident -- who didn't know the woman -- shooed her out."
There is no way a woman in that mental state could make it on her own from Escondido to Mt. W and make the hike.
But I sure hope they find her. It must be awful for the family when someone walks away like that.