I'll see if I can find someone riding Friday and let you know ASAP.
The main loop is 8.3 miles. There is another section being built that adds another 1.25 miles or so but if your getting in a pre-ride you may not want to ride that. It is obvious that it is new so it should be easy to avoid if wanted. Most of the trail is easy to follow but there are a couple unmarked intersections that give folks some trouble especially with the new stuff. We're working on rectifying that situation but that doesn't help you much now does it.