Devils Playground (NC)
I do not know a lot about this place but it is close to where I live. This is not a public place but is open on certian dates for people to ride near Lexington, NC.
Located in Silver City, NC, you can go to the Devils Playground website for more information about when there are open rides. For directions, try this Google Map search.
Anyone who has any more information about this park, feel free to pass it along.