Discovery Bay is along the former Milwaukee branch line between Port Townsend and Port Angeles. It was an isolated line that brought railcars by barge from Seattle. After the Milwaukee Road folded, this branch ran as the Seattle and North Coast from about 1980 to 1984. The track was in terrible shape with a lot of 10mph speed restrictions, I think. They were trying to do some upgrading, typical shortline struggle for survival. Maybe there was a tourist train that operated at Discovery Bay at one time?
I happened to stay at a motel at the "bottom" of Discovery Bay when I was on vacation from Omaha in 1980, the day before Mt St Helens blew up.
The Seattle and North Coast had a cool paint scheme, I've wanted to get a boxcar with that scheme. I think they operated (briefly) with old F units?