So I didn't really know where to post this, but I thought I'd kill two birds with one stone by creating a thread for anyone who has classic USH pics.
In any case, I was watching the recent Expedition Everest video (a great YouTube channel that documents many attractions, many defunct--most in Florida or England, this is one of his few West Coast vids). In some of the archival footage he found of the park was this, which I managed to screen shot.
While I obviously recognize the sign, I honestly have no idea what that stadium is in the background. Does anyone know more about it?