Start on Hinemaru Street in between Arawa and Pukuatua Streets. Head south down Hinemaru Street to Queens Drive, turn left and follow it around (slight rise up to the big building on the right) until it loops back to Arawa Street, turn left into Hinemaru Street and repeat the lap. The second lap ends on Hinemaru Street about 20 metres short of the intersection with Queens Drive.
Thanks to Mattz for the info.