Hi @Hali3756
There are hosts who have listings next to the ocean, but get a call-out such as (for example) "10 minutes' walk to the beach". It seems the beach is a very specific point on the map (such as the main swimming area with lifeguards), so a listing can touch the sand but be classified as 10 minutes away from the actual beach.
In your case, the point may be the park's main entrance gate, or some important feature inside the park (you know the area and may be able to figure out where it's measuring to).
I'm just mentioning this, in case it helps you to explain to Support what the issue is.