One example is the Anthracite Outdoor Adventure Area (AOAA) Eastern Pennsylvania, in the southeast part of Northumberland County in Coal Township, Pennsylvania.
https://www.aoaatrails.com/
Now, come on, does this not sound way better than three days at Walt Disney World?!
The trails are marked as green, blue, or black. Green being the easiest. The video below is an example of a green trail.
https://youtu.be/gkyn63AZNO0