I've climbed via Brookes Track from Loongana and the Tramway (Winterbrook Falls) Track from Smiths Plains. I've also walked down via Maxwells track and completed the circuit by walking around the road to the Tramway Track carpark.
Of all these routes, the Tramway Track is my favourite because:
* History - Old saw pit and wooden tramway
* Vegetation - All of these tracks feature changing vegetation from rainforest in the gullies to wet eucalypt scrub on the slopes to alpine shrubs up high. The Tramway Track has the added attraction of passing through the most northerly King Billy Pine forests in Tassie (and in the world for that matter).
* Starting altitude - Carpark is almost 200m higher than Loongana thus less altitude to be gained
* Climb is done in sections with levelish patches between - Once the Brookes Track starts climbing, it's fairly relentless
* Interesting Rocks - The link track from Winterbrook Falls to the ridge above Paddy's Lake climbs through some interesting rock formations and slabs
The main advantage of Brookes Track is distance. It is the shortest and most direct route to the summit.
If you are a nutter for reaching the highest point of an area, it's worth knowing there's a point on the Black Bluff Range slightly higher than Black Bluff itself. You reach this by walking 2km past Black Bluff on the Penguin-Cradle Track and heading to the high point slightly west of the track. I learnt this from "The Abels" and have not yet bagged this one. The weather was absolutely foul last time I walked this section of the Penguin-Cradle Track and a detour through the mist with virtually nil visibility seemed a touch pointless.
Track notes for this area have been produced by the
NW Walking Club as part of their work on the Penguin-Cradle Track. There were also detailed notes done for the Tramway Track when it was established 20 years ago but I'm not sure if they're available on-line.