A: I have never seen a dirt bike above the guardian at waypoint 2. It takes a pretty hardcore rider to clear that obstacle.
–Ryan Boudreau (01/08/2019)
A: Kelly, sorry for such a late reply; obviously the trail is impassable now through June or so, but to answer your question--I've done this trail two times and have not seen a bike on it, only have seen ATVs. A bike can certainly do it, though, just be especially careful on the shelf road (Waypoint 3) because it's comprised of loose rock.
–Tracy Barker (01/08/2019)