Hmm it's not TOOO long I'd say 50 yards (about half the size of an American football field) give or take some. As far as a clear corridor goes Here's a bit of an in depth drawing :D!<br/><br/>The narrow part is just a 'typo' from cutting and pasting the little dots that represent you guys around.<br/><br/>(http://img514.imageshack.us/img514/8014/habblock.png)<br/><br/>