Theres only one entrance to the park, it's on the southside of the park, exactly where the address is. There is a lock on the gate, so maybe you came when it was closed.
It's a little ways off the street, there should be a sidewalk going directly north right next to a house in about the middle of the block. Hope this helps!
It's not immediately obvious but I believe there was a sign near the sidewalk going back. We had to park on the street
The entry way is adjacent to a house.
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