totally black object in the sky

I,m not sure why i'm doing this... My friend and I were returning from a county or state fair.  I would need to look up the road and state highways in the area to to exact about this. On the way back home, on the crest of hills, we noticed a black hole in the sky. It was a moonless, totally clear night with nothing but stars in the sky. On the way home, we started noting this hole in the sky. As we approached our turn-off, we decided our path was going to take us directly under the object we had been seeing for miles. It was just a couple of miles outside town that we drove almost directly under the object. I pulled onto the shoulder of the road, and we both got out of the car to check it out. I, being a tough guy, picked up a rock and threated to throw it at the object, directly over-head. My friend freaked-out and begged me not to, though I was also afraid and didn't really plan on throwing the rock. We stood there for a minute or two, looking at this black hole in the sky, got back in the car and went home. That is all. I would say the object was 100-150 yds. long. It was 30+ yds. wide, larger than a football field I think. It had no lights of any kind at all. It made no sound at all. I can not explain what it was, even by todays technology.
Witness indicates that the date of the event is approximate.  PD