Allamuchy:
Print this map in color (because the one at the kiosk really stinks):
http://www.mtbnj.com/files/AllamuchyNorthNJDEPMap.PDF
And follow this route: This is a decent 10 or so mile technical run out there that doesn't require a guide (it feels like much longer than 10 miles with those hills). Following the map from the Waterloo lot go to the red loop and follow it to the left (or clockwise around the loop, it is the direction that is more fun of the red). Following the red in that direction, after reaching the pinnacle you go down a quick loose rock downhill, you will see an unmarked trail to the left. At the beginning of that trail is a pretty sick rocky bridge going over a downed tree. Follow that unmarked trail for a bit and you will come to a "T" at the white trail (if you look at the map and see where the white and red come parallel to one another this unmarked trail basically cuts over from the red to the white). Take a right on the white trail follow that for miles until you come to the green trail (this part will take a while, go past "Ice Cream Hill" sign on left). Take a right on to the green trail and follow it to its end. You then can take the rail trail back to the lot. In able to find the rail trail you will have to take the road for a few hundred yards and you'll find the rail trail around cranberry lake on the right side of the road.
With the colored blazes and that map it is rather difficult to get lost. This trail takes you through main fireroads through the park. But they aren't your average fireroads. They are eroded and fun, with big embedded rock. Moast of the singletrack is unmarked so you shouldn't really venture without a guide. But trust me coming from CR and 6 mile this loop should be more than an eye opener.
The red and white section have some nice hills and rock faces. The green is rather flat, and kind of boring at first, but hold steady, after it takes a turn it is nice, flat, and technical.