All of these routes begin at or near the top of Mt. Wilson. Need somebody to guide you down? Check out XEN MTB Southern California Guided Mountain Biking Tours.
Some of these trails may be in the Station Fire closure areas. Check with Angeles National Forest website for current restrictions.
Mt. Wilson Shuttle Run Options Spreadsheet
Buy a map!
This is by far the most detailed map of the Mt. Wilson area:
Harris Mt Wilson Area Map