In reply to The Watch of Barrisdale:
> I've always combined An Riabhachan and An Socach from Strathfarrar. You can drive as far as the power station in Glen Innis an Loichel
Beat me to it - was about to suggest this as well. I've not climbed either hill from there (only time I've climbed An Socach involved walking from the border!) but was once at the Monar dam (prior to heading for Maoile Lunndaidh and An Sidhean in a boat which broke down mid-loch) and chatted with a man (possibly even yourself or Captain Solo - this was 3 May 2007) who was heading further up the hydro road to climb those hills.
The other benefit of this is that it then opens up options for leaving the Mullardoch ridge by one of the side spurs rather than feeling obliged to go right along and then return along the length of the shore. I've come down the SE flank of An Riabhachan which was fine, and a S then E route off Sgurr na Lapaich looks good too. An Riabhachan is a tremendous hill, underrated, with a lovely summit ridge.