The strip is called "the rubber". I am an umpire and this is what i know it as. I am not sure if it is the official name, but if you say the term in context to the strip on the mound, anyone who knows Baseball will know what you mean. It is unlikely that the term will be confused with anything else as everyone from announcers to umpire use it.
I was wondering how high the pitchers mound was in little league?
60 Feet, 6 inches(Same distance as Pitchers Mound to Home Plate.)
The diameter of an MLB pitcher's mound is 18 feet.
it is 300pounds
the distance from the pitchers mound to home plate is 60 feet 6 inches.
to legally play only one person can be on the pitchers mound while the game is in play