Challenging day walks around Hobart

Hi,
I'm relatively new to Tassie and I wanted to know what day walks around Hobart area people would recommend? I'm wanting to build my fitness in order to attempt multi-day walks in the future. I want walks that are at least 5 hours and are hard (or shorter but really steep). I want to be really exhausted at the end of the day! Will happily walk for as many hours as there is daylight at the moment. Thanks so much!
I'm relatively new to Tassie and I wanted to know what day walks around Hobart area people would recommend? I'm wanting to build my fitness in order to attempt multi-day walks in the future. I want walks that are at least 5 hours and are hard (or shorter but really steep). I want to be really exhausted at the end of the day! Will happily walk for as many hours as there is daylight at the moment. Thanks so much!