One of my favourite hikes in Tasmania was Black Bluff Hike.
Black Bluff track is part of the long track, Penguin Cradle Track. The track starts at Taylors Flats picnic area and follows along the Leven River for 1 km.
After crossing the creek, you start the ascent to the top of the mountain, through the forest. As you come out of the forest and you approach Paddys Lake the scenery becomes alpine with stunning views.
The summit trig is at 1339 m. and you are almost 1 km higher than the starting point. You realise how much you climbed when you retrace your way down on the same route. Definitely worth the effort.
This is a 12.87 km route in . The route has a total ascent of 954.41 m and has a maximum elevation of 1,320.98 m.
Difficulty is hard.
I have posted this walk on everytrail which now is alltrail.com