Hiking in Melbourne Australia

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Any Melbournians out there?!

Just moved back to the eastern suburbs and looking for places to run/hike/walk - I'm a fan of the thousand steps in the dandenog ranges national park (although its been a while since Ive done it) and was wondering if people knew of other similar (or different) hikes or tracks that are good.

I've heard theres an obstacle course somewhere around wonga park aswell..

let me know if you have any suggestions!