Here is a list of all multi day (overnight) wildwalks, they are ordered by length. Happy walking :)
Main Range Track - Loop from Charlotte Pass camping near Mt Townsend
27.7 km Circuit, 2 Days
Experienced only
Scenic Railway - Ruined Castle - Mt Solitary - Kedumba River - Wentworth Falls
29.3 km One way, 3 Days
Experienced only
Congewai East Track Head to Watagan Forest Motel via Forestry HQ Campsite
29.7 km One way, 2 Days
Hard track