Para Hills is about sixteen kilometres out, spread over the rising ground the name refers to, and the gullies running through it have mostly been left as public park.
Hills change what your body has to do. Running or walking on a genuine gradient is a different job to doing it on the flat. Uphill loads calves and Achilles harder. Downhill loads quads and knees eccentrically, which is the mode most likely to leave you sore two days later and the mode most people never train deliberately.
Neither is bad for you. Both are excellent, in fact, provided the tissue has been prepared for them. What causes problems is switching terrain without switching expectations, which in Para Hills usually means someone who has been walking the flat suddenly doing the gullies several times a week.
The knee is the usual casualty, and it is almost never a structural problem in that scenario. It is a tolerance problem, and the answer is graded exposure rather than avoiding hills.
The other Para Hills pattern is the long-term resident. This is an established suburb with a lot of people who have lived here for decades, and what comes with that is the recurring complaint: a back that flares predictably, a shoulder that has been managed rather than fixed, a hip that quietly dictates what you will and will not do any more.
Those are worth another look, particularly if the last proper attempt at them was years ago. Recurrence usually means the rebuild never happened, not that the problem is permanent.
Around fourteen minutes via North East Road.