Turns out the course setter did very little fieldchecking and didn't even know about the trail through the green and was expecting it to be a choice of right or left on the road :)
When I mapped that trail, it was kinda in between indistinct and distinct, and there was a bunch of junk in there (from homeless encampments or something). They obviously took a wide mower in there and made a nice wide trail!
Patrick, that's what I remember too from one of the previous runs. On the way to 21 running on the pavement, I saw the wide clean opening and thought hm this looks cleaned up, let's check it out. Plus I don't have to climb extra:) But then I botched the exit for some reason cutting through the green. Looks like Eric J time was not that bad going through the trail.