I know two brothers who swear they saw a Bigfoot by Mt. Lassen around 1960. I first heard the story in about 1970 when I was a kid. I've asked them separately about it multiple times over the years, the last time was about a year ago. Their stories have never changed or wavered. I'd think that if it was BS there'd be variations and changes over the years. Well there was one change; as one of the brothers got older he finally admitted that he screamed like a little girl.