Another good cycleway is the Prospect-Fairfield-Canley Vale-Guilford-Prospect loop.
It is a 35km off road cycleway, well marked and varied scenery.
If you need to drive there, I suggest you go to the Prospect reservoir picnic area parking area.
An added bonus is you can cycle between this loop and the M7. There are a few option to hop across. Don't ask, just explore!