The Main entrance is found on Samford Rd at the Ironbark picnic area. Another entrance is at the Lomandra carpark a bit further up Samford Rd towards Samford itself.
There are about 5 or so legal single track trails here which are linked up by the fireroads to make a fun network.
Ironbark is a great place for long distance trail riders to center themselves as from here you can make your way along an old railway cutting and climb up Camp Mt and then into Bellbird Grove or even head into Brisbane Forest Park. Another alternative is to ride some of Ironbark and then cruise over to Bunyaville State Forest only a few short kilometres away. Ironbark is mostly fireroads but some are very narrow in places and there are some great descents to keep any rider happy. There's plenty of climbing to do to enjoy those spoils though.