Ballachulish to Glen Creran - two to three hours.
A more significant undertaking than Clack Tholl. You will need two cars or a friend who does not mind being chauffeur for the day. The start of the path in Ballachuilish is sign-posted and there is a convenient car park. Starting from the Coop general store (which is easy to find and conveniently sited for stocking up on provisions for the day) carry on past the shinty pitch. The road narrows and winds round to the right. There is a small narrow bridge which was never intended for motor cars and an overhang of trees. The path you want is the one which starts on the far side of the bridge. The car park is just a few yards further on. Park your car and step out bravely, climbing gently past the village school yard and through several farm gates which screech in complaint as you open them (and close them again of course).
And so you will reach the open hillside. There are sheep about so if you have a dog be sure to bring a dog-lead. Later, if it is obedient, you can release the mutt. The path is easy to follow. Quarter of a mile along the way look right up the great west ridge of Stob Ban, one of the peaks of Beinn a Bheithir. That's pronounced "Ben Vare". That "a" in the middle is silent and everything else is exactly the opposite what you English-speaking people are used to. But you will pronounce it your way. That's what English speaking people tend to do. The West ridge is one of the more exciting ways of reaching the summit of the mountain. But it is not for those who suffer vertigo.
The path, however, is not exciting - it is delightful. It leads over a style and fords a cascade to reach a flat place which I would describe as "round the corner". At this point the path becomes more vague. A mile or so on, look for a small branch line which leads left down to the river. Follow it and ford the river. Foolish person! You should have worn strong boots!
Climb the hillside beyond the river, rising diagonally right, to reach a col (or beallach) at about 800 feet above sea level. There you will find a deer fence and a gate giving access to a proper forestry track which leads you (at one point steeply) down into Glen Creran. You can't miss your way now. In fact the forest is so thick at points you can't see much else but you route. But then there are wild flowers and further down the blanket conifers give way to an venerable and mouldering wood. The car park at this end is at the very end of the tarmac road so it will have been found easily by your chauffeur friend who will be waiting with a rather huffy mood (because you will keeping telling him/her that he/she missed out on a rather good walk).