...it FEELS a lot longer. Most of the walk is unshaded, and tedium sets in after the first five minutes. On a hot day, I wouldn't recommend it.
But you can't beat the convenience. When we stayed at the BW last fall, I made the trip a couple times. If you aren't in a hurry, and the heat isn't awful, it can be pleasant.
<i> TIP: to shorten the trip a bit, cut through the BoardWalk pool area, just past the slide! </i>