The grand circle trip, broken Hill, Rex to Adelaide, the Overland to Melbourne then XPT north.
The overland has another three years funding.
But with Vic/SA border closed, it's not operating until later in the year.
There's now a NSWTrainLink coach twice a week from Adelaide to Broken Hill or return. Haven't looked it up to see what days it operates.
There's another NSWTrainLink bus from Mildura to Broken Hill, which from memory (I haven't used it) is three days a week each way. V/Line operates coaches to Swan Hill or Bendigo then trains to Melbourne.
Neither of these NSWTrainLink coaches seem to be in the 'Western Region' timetable as they're not yet permanent, but by using the online trip planner, one can find them.
Both remedy substantial gaps in surface transport, as there were no other operators (rail or coach) although for a while some outfit called 'Buses'R'Us' ran between Adelaide and Broken Hill, but at very high fares. The weekly 'Indian Pacific' train unfortunately doesn't have sitting cars any longer and does not sell local trips, only Adelaide to Sydney in its sleepers.
Discovery Pass is valid on both these NSWTrainLink Broken Hill coach routes.
..I recently bought another Discovery Pass too, since I'll probably be spending a lot more time than I usually do in NSW over the next six months. I can't believe the price is still $550 for 6 months of unlimited first class travel - it hasn't gone up in years (although, neither has the quality of the service if I'm honest).
I made good use of the pass last month, travelling from Canberra to Sydney, Coffs Harbour, Katoomba, Orange, Dubbo and Condobolin with NSW TrainLink. It's a nice way to travel when you're not in a hurry.
Mattg, if you have the time and inclination, Sydney to Moree on the XPlorer train is enjoyable. Check to make sure there isn't trackwork that results in road coaches instead. The baths at Moree attract many Sydney-domilciled central and eastern European Oz migrants. At times when attending I've thought I was in 1960s Australia!
Another enjoyable trip through very scenic country (separate ticket for V/Line, but not expensive) is Melbourne to Bairnsdale by train, connect to V/Line road coach, choose to overnight at Bombala or Cooma - then using your pass NSWTrainLink to Canberra by coach and then Sydney by train (or Yass Junction by coach and then XPT to Melbourne) or many places in Riverina/western NSW by changing at Cootamundra (or in a few cases Wagga Wagga or Albury) from the train to a coach again. All works well and you won't be stranded. Very extensive network.