Head through the farm field to the trees on the far side(about .4 miles) The trail is fairly well marked with yellow arrows from here on. There are several options away from the main trail, but the marked 3 mile loop is the best, least muddy riding. The builders of the trail describe it as a single-track roller coaster, and I think that's an excellent description.
Review: Both sides of Fitzsimonds road are incredible...Mobbs Hill is great for a challenge, the ledges are long and really fun. Plenty of smooth riding on the east side of the road as well. I'd give it five stars but its a little on the rooty-bumpy side in places. Incredible swimming holes and enough variety for everyone.