Near Gembrook, the 16,600 hectares Bunyip State Park is renowned for its mountain bike tracks, albiet overgrown and steep at times. A good starting point is Gembrook.
Bunyip State Park is only 65km east of Melbourne. You can get there via Gembrook, from the Princes Freeway, or from Woori Yallock.
Overall, Bunyip State Park is the 13th most popular mountain bike trail of all 30 mountain biking rides in Australia.