It is a 30 to 50 minute walk depending how often you stop to ponder the sights.
It is easy to walk and you pass the detour off to the "Twister". If you go to the Twister you can rejoin the Northern Trail without doubling back.
7 - Go clockwise. Seems that the grades are a bit easier but it is all easy.
(126 pics at 2 secs = 4 min 12 secs)
8 - Go counter clockwise - Seems to show the features better!
(143 pics x 2 secs = 4 min 46 secs)