Hi!
I only walked it once, but its out in the open, and a very short walk...I think about 10 minutes, 15 if you are strolling along slowly...and it is a very nice walk, going by the front of the magic kingdom and walking by space mountain...I do believe you cross a street or perhaps just the entrance to the parking lot? I could be mistaken, but it seems VERY convenient to be able to just walk back to your hotel at anytime for a break or after the parks rather than wait for the boat or monorail.