Indeed that is the taxiway for runway 21 at YLTV Latrobe Valley. It's where I first flew a 172 with young Evan Constas as my instructor. I believe he has moved onto big stuff or at least he did some 20 years ago. That was when John Willis was the CFI. The 172 was somewhat less advanced than the one in your picture.
Dr, I may be aware of "someone" that has taken off on that taxiway, just sayin'