20% of the normal attendance this year at all of Mt. Shasta Cities events like walk run, parade and fireworks at Lake siskiyou

 The likely main cause is that people are terrified of what crazy dictator like thing that Trump is going to do next. 

So, singlehandedly Trump is destroying the economy of not only ALL tourism to the United States and all businesses catering to tourism here in the U.S. but also destroying the world economy.

Could a Recession or another Great Depression be far away?

I think if he continues like this a Major recession or even depression is very likely at this point. He has already created a Tourism Recession or out right depression this year and likely this will continue as long as he is in office terrifying all Americans and People all over the world so much that nobody is traveling anywhere but the very rich. This is the reality right now in the U.S. and around the world.