In reply to MusicalMountaineer:
Walk up to Coire Lagan then take the right hand side of the lochan maybe a hundred feet above the water. Up ahead across the scree (looking toward Mhic Choinneach) you'll see a notch in the rocky arm extending down from Sgurr Sgumain, attained by a small gully only slightly higher than you are now. Breach the barrier by this weakness and then turn up the ridge soon negotiating slabs (moderate, but a rope advised for beginners) and then some lovely easy scrambling all the way to the summit of Sgumain. Great views of the Sron na Ciche face. From there follow the ridge all the way.
This outing is in Skye Scrambles and I'm only describing as I remember it from about 3 years ago. Sadly my copy is eleswhere so I can't look up to verify. I strongly urge you to double check, firstly 'cos it's a great way on to the ridge from Lagan, and secondly 'cos i might have missed out a critical detail and be catapaulting you into an epic.
We finished on the Pinn via An Stac and it was an utterly captivating experience from start to finish, despite having done all the individual sections before (and many times in some cases).
Enjoy