Janette, The only hiking trail I can think of that was closed up there was the one that followed the top of the cliff from near the Tower to the top of Staircliff and continued toward Woodland bridge and the Gate House. If that's the one you are talking about it was closed after a female tourist hiking it fell off the cliff. The trail passed very close to the cliff in some spots and if you were hiking la-dee-dah and stumbled you could fall off. It happened around the time or just before Skytop was closed to climbing. If that's not it then I have no clue.
Just another Mike on Gunks.com