The trail system is actually 10-20 miles long and crosses several major 4-6 lane roads. There is a group ride every Tuesday starting at 6:30, I believe, which I highly recommend just so you can get a feel for where the trail goes. There is a hard to follow section through some normal width roads which is the only way to follow the trail, so if you want to maximize the amount of trail you can ride, I again recommend going with the group the first time you go. Also, beware of LOTS of broken glass in the section within the park, close to the jumps.
The map on AllTrails is not accurate. The trail is actually a couple miles west on Swan Road behind the County Parks property and the Escweiler Buildings. By the way, I'm only submitting one star on this trail because you have to pick a rating to submit a comment.