The M4 Cycleway is surprisingly very well signposted, even with the detours the diversions signs were everywhere. The best part of this ride is the destination. Cabramatta, home of the best Vietnamese food.
Route: Glebe - Zetland - Sydney City - Lilyfield - Haberfield - Olympic Park - Auburn - Harris Park - Wentworthville - Fairfield - Cabramatta
Path: Mostly Cycleways, separated paths, some bike friendly roads in the city
Hills: Only a few with small gradients
Sights: Buddhist temple near Cabramatta station along the cycle way
Treats: Cabramatta offers the best selection of Vietnamese food, check out this blog for a map. Also because of the strong Buddhist culture there are several vegan/vegetarian Vietnamese restaurants as well.
Must try: 3 colour bean drink (Che Ba Mau)