freebeer
Your marker stands near by the spelling Pinicon.
Your question appears as if the park is unnamed as you do not refer to the name it has had for years.
A g00gle text search I just did does not give the user report credence.  Not even any doubt.
Check the name of the river.  Even google suggested the mapped variant over your proposed.
Thus I shall mark this report as resolved by armchair, in absence of evidence otherwise