Define UFO ... because that's a problem here
People generally immediately assume it means ship with occupants - WRONG
What most people see in Bigfoot territory are anomalous lights in either the sky or the forest. In my case and with several others I have spoken to, we are observing spheres of plasma like pure energy, which navigates the atmosphere with intelligence. There is definitely a correlation between these plasma sphere's and active bigfoot territory. What type of linkage one could assign to this, is in the realm of speculation.
The plasma spheres technically are UFO's, but clearly they are not metallic ships with ET's inside, though they do possess intelligences. All of which leads to another problem ... Define Extraterrestrial ....