: I live in Mahwah, NJ (north western NJ). Driving home on 5/19/01, I see a 3 ft. (approx) very dark gray snake side-winding across the road, heading from one pond to another pond. What species could this guy be?
It was most likely a black racer or a black rat snake. These are quite common in your area. If I had to guess I'd say racer, they are most likely to "sidewind" accross a road. They aren't called racers for nothin'.