Tai Tam is really hilly. Below is my suggestion :
Start 英皇道 (Quarry Bay Station) - 柏架山道 - 金督馳馬徑 - 畢拉山 -黃泥涌道 - 大潭水塘 - 大風坳 - 英皇道 (End)
I need 2 hours to complete one lap.
I am OK for Saturaday or Sunday morning! But the problem is no place for Chings to take shower after run.
For the path I suggested, you can either run or walk, it is really hill especially from dawn to top.
Actually, It's almost same route as Mt Butler Race except starting from 則漁涌市政大廈, Mt Butler Race lenght ard 15K + 2.5Kx2 from 則漁涌市政大廈 to/fro 金督馳馬徑, total ard 20K