Are you saying that the snake has like a "hood" around the head? If so, that is a cobra.
Red Coachwhip or "Red Racer
king snake King Snakes do not have triangular head and are also not totally black. They are most commonly black with thin white stripes. Solid black may have been a common black snake or racer, although juveniles have a bluish tint. They also do not have triangular heads
A Black racers head is more of a roundish oval shape
the redhawk snake. found only in the united states area.
probably a coral snake or something
depends where you are but if you where in brittain i would have to say a grass snake
I have know clue but i wanna know cause my brother saw one in our barn he described it as gray body black head and a lil bit to 17 ft!!
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sounds like a rattle snake. Does the head come to a point and you can tell the difference between the body and head? If so it is a rattlesnake.
Lots of snakes are brown and black. You'd need to be more specific about the patterning, size, head shape, and location you spotted the snake to get a good answer.
It sounds like a king snake, they are harmless. I cant tell you what kind it is because it depends on were you live.