Hard day walks around sydney

This year's studying is really deconditioning me as I'm constantly getting smashed with assignments, exams, tests, quizzes, etc etc etc...
Planning an overseas high altitude trip next year and I have to seriously get my act together. Joined a gym and bought a bike, but i'm finding it real boring compared to doing hard day walks.
Have been carrying 30kg packs up the east side of Mt soitary and back in a day which is a 1600m climb all up according to the GPS. Its great scenery there but was hoping if anyone else had ideas for other walks closeby to sydney which involve 1000m+ climbs in a day.
just looking for variety
Planning an overseas high altitude trip next year and I have to seriously get my act together. Joined a gym and bought a bike, but i'm finding it real boring compared to doing hard day walks.
Have been carrying 30kg packs up the east side of Mt soitary and back in a day which is a 1600m climb all up according to the GPS. Its great scenery there but was hoping if anyone else had ideas for other walks closeby to sydney which involve 1000m+ climbs in a day.
just looking for variety