This is the WORLDS FIRST SKATEPARK of record we can find. They moved soon after opening and according to newspaper articles were hopeful to sell there design and kit to other places around the USA. Kelso Washington bought one and opened the 3rd skatepark which got a mention in Popular Science magazine in April 1966.
The next skatepark of record is Surf City in Tempe Arizona and it was the first concrete skatepark.