The stories are perpetuated primarily by the Chambers of Commerce in Mt. Shasta, Weed, and McCloud. The stories are a good source of tourism
dollars.
Any civilization dumb enough to make their home INSIDE an active volcano that can erupt at any time deserves to go extinct.
Yeah, I live near there. The Lassen Peak and Mt Shasta bases make for some colorful tales but most people are smart enough to know they are only
tales.
You forgot about the UFO base inside Pilot Peak in Plumas County, CA, west of Quincy. It's another 'secret base'.