I rode those trails for years before moving out of state. Loved them! They used to close the trails twice per year when the Rockefellers had a huge gathering and the carriages used to come out. If you were able to get near the trails, you were able to see them being driven around in those antique buggies.
We used to ride to the top of some of the hills and be able to get a view of the estate. There are some places where there are fountains built into walls where we were told they used for watering the dogs when they were out hunting. There are 3 stone bridges as well if I remember correctly.
I used to board at a place called Beech Hill