Kanagra-Boyd by Fire Trail

Although this is quiet a long ride, it's technically easy as is pretty much 100% fire trail.

Start/finish in the carpark by the famous walls lookout. You notice from the profile that there's a climb back up the road from where you came, but this isn't as steep as it looks. Then take a left off the 'main' (if you can call it that) road and head North on Morong Creek/Kowmung River Fire Trail. You'll come back out on the road before being able to head South on Boyd River Fire Trail which joins back up with your original route.

From there just head back to the road and back to the walls carpark. Ride on through though and be sure to check out the view of the walls before leaving: