Don't know that I can recall that one. Do you mean at Conondale or the other track, what was it... Stanmore Park? There was an endurance race at Toowoomba I think, can't remember now but I think that was MX. That one lasted for quite a few years too I believe.
There was a lot of local MX and DT back in the late 70s/early 80s. The old Dirt Track races at Tivoli, Kedron, Kingaroy and so on, plus MX just about everywhere. Around my home town we had races at Hervey Bay, Maryborough, Miriamvale, Mothar Mountain at Gympie and so on. Plus with the enduros and black events and you could race nearly every weekend in that part of the world.
Ahhh... the good old black enduro/pony express races. All those guys racing like Roger Sover and his mate Richard Sole...