The trails open to bikes are used by horses also (bumpy!). Most singletrack is hiking only. The trails are up and down and riding to the knob itself provides a great view from the watch tower, enjoy...
How to get there:
The easiet way to access the knob is to enter from the North off from Highway 9, East of Forest City. There is an entrance via back roads on the South, this is a better place to ride from.