NOTE: This description came from the Website: http://www.scotclimb.org.uk/bennevis.shtml
More Routes can be found there, too

Head for No. 5 Gully from the CIC Hut. and once it becomes a proper gully (cliffs on both sides) you should see a 'slopey-shelf' leading off and up to the right. This is the start.

Route Description

The Website above states: "Ledge Route is described as The best grade II on the mountain in some of the guides. It's easy to see why."
Richard Purchon's Comment: "Ledge Route 1,900ft Scottish winter Grade I , a simple snow route not recomended in Climbing guides "

Rest from the web-page above :
Normally an ascent route it can also be descended in summer (easy scramble) or winter should the situation dictate. The routes starts at the bottom of No. 5 Gully and ends on the summit of Carn Dearg.

Climb this and then traverse around to the right.
This leads to a ledge/shelft above the first pitch of The Curtain which you would see on the walk-in.
From here, a gully leads up and left... climb it!

Depending on snow conditions, things get a little hazy about here. The guidebook suggests that you do a long traverse and then you're on the ridge proper which you follow to the top.
We ended up climbing a further 3 pitches all of which were 50m and all of which had no runners (but you shouldn't fall off, should you?).

If you're lucky there will be some nice ice-pitches which you can climb, too, raising the grade to III.

Route finding isn't really a problem (unless you step off the cliff) and loads of variations are possible...

Essential Gear

A Deadman or two are really helpful !