Thanks for clarifying. "Closed" was the wrong term to use as I suspected some of the trails had just been naturally reclaimed by the forest due to lack of use/maintenance, but it's interesting to see just how many.
that's the point though, a lot of the trails you list have been lost simply due to lack of maintenance and/or lack of ridership. some of those trails were built by dangerous dan for a very select group of riders who could actually ride that stuff. i agree it's sad that some of the shores history is slipping away, but if harldy anybody can ride a trail then it's fate is pretty much sealed.
We don't know what our limits are, so to start something with the idea of being limited actually ends up limiting us.
Ellen Langer