10D Beinn nan Cabar, Cruach Dhubh an Ruidhe Fearna (Hump) and Sidhean Mor
From the road bridge NM715851 I followed the path along Glen Bleasdale but couldn't see the track up to Bealach a'Mhama and followed the obvious route following the river to NM745861 and then generally E, S of the unnamed lochan and NE following the line of an old boundary fence to Beinn nan Cabar.
From there it was N to the deep Allt a'Bhlair Dheirg (crossed at NM762877) then NE to the Hump of Cruach Dhubh an Ruidhe Fearna. Then SE, under South Morar, N of Sgurr Nighean Mhic Choinich and S of Lochan Feith a'Mhadaidh to reach the NE flank of Sidhean Mor. It was an easy descent SW back to the outward track.
(7 hours 25 mins, 10.6 miles, 3700' of ascent)