From Hataitai to City track head up a rooty though fairly wide track that is quite steep in places.
Keep heading up hill and to the north until, after about 0.3 km, you emerge into an open grass area. Just before the grass area is an intersection with Lookout Scenic track, which heads off in the opposite direction towards the southeast.
In the grassy area, swing around to the right and up a steep section to join Southern Mt Victoria track at the point where it veers around to the east towards Palliser Road. Southern Mt Victoria track and Lookout Walkway track coincide for 0.2 km, so just continue up the hill towards the southeast. At the next major intersection (which is also the end of Lookout Scenic track) head up to the left and then sidle around the hill just below Lookout Road.
About 0.25 m from the last grass area you'll encounter the final intersection. The left-hand branch continues to Lookout Road via a set of steps (which can be ridden down, if you stay on the left-hand side of the steps), while the right-hand branch goes straight up to the main car park just below the summit.