Start and finish at the sign at the beginning of trail. Up by Old Briddle Path and down by Falling waters trail.
I made today the «fastest known time» for the Franconia ridge loop. I made it unsupported and you can access my GPS timing here connect.garmin.com/activity/149865079
My time for the loop is 1hour 54minutes 02 seconds. I must say that it's winter time so the hardpack snow make it faster for the descent than in summer. On the other side I get crust snow on the ridge that make running much less enjoyable!