Chase - Welcome to the site. You will find all the information you could ask for here, and lots of folks willing to share their knowledge.
The marina was in Piute Farms Wash. If you go to the map on the site of Fred's liquor store, theres a pretty cool map that shows details of the lake and you can see the bay where the marina is located.
http://fredsliquorstore.com/uppersanjuan.html
You made me curious so I went looking through old photos (the old fashioned, pre iPhone kind) and found 2 not great pictures I took when we pulled in for gas. It was September of 1988.
I have to say I like your taste in areas of Interest. The San Juan is our favorite part of the lake. With the lower lake levels, in the past 10 years we have only been as far as Nokai, but most years we don't even venture past Alcove Canyon on the Great Bend. I'm not anxious to find a rock with my prop when we're that far up. It's pretty isolated.
I will say I am almost glad the marina is no longer in operation, and that a marina was never build between Nokia and Copper. I like the lack of boat traffic and isolation that you find on the San Juan due to the lack of services up that way
I have to
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