The short answer is in many cases yes. It all has to do with "historic" use. Old man Cone (as in Moses Cone, the inventor of denim) created the roads around Trout Lake and Cone Manner as bridle trails for him and family to ride horses on. There may have been a bike back them on the estate, but horses were the main thing.
Originally Posted by Cedarbranchbiker1
I spent yesterday on the Biltmore Estate and it is the same way. The Vanderbilt family had a large equestrian program and used horses on the estate roads, but also to go on multi day hunting trips on what is now Pisgah (which used to be Vanderbilt land). There are photos of bikes on the Biltmore Estate and historic use, but horses were the main thing.