John;First off it is not the senior pass, it is called the "Golden Age Passport". Next month I will have had it for twenty years. When I got mine there was no extra fee, just the $10 bucks. I use it a lot when touring on my '03. In fact , Lassen Volcanic NP is close by and I have a great view of Lassen Peak from my home. One of the nice things about getting old.
Ed
I was careful in the wording of my statement to cover my circumstances only.
I'll be damned, just looked at what I though was my 'Golden Age Passport' .. It says 'Senior Pass' . go figure. May be older than I think.