Walking Street itself is only about a kilometer or two long. I am referring to the most famous or notorious part that is closed off to vehicle traffic during the evenings to accommodate all the foot traffic. It extends from the entrance to Walking Street under the archway at Pattaya Thai and extends down to the Bali Hi pier on the other end.
Keep in mind that Walking Street is actually an extension of Beach Road that runs parallel to the beach, but is simply closed off to motorbikes and cars at nighttime. During the day time one is able to use it as a road for more direct route towards Jomtien.
There are many side streets that branch off of Walking Street proper, and sometimes those are also considered part of Walking Street as well. This entire area is packed with various clubs, bars, and discos and is filled with loud music, dancing, and revelry.