Alone. From Achnashellach Station up the path NW from the station. Took the RH of 3 branches as shown on map. Shortly afterwards a cairn on the left marks the start of a vague track (not shown on map) which ascends the E side of Beinn Liath Mhór. To Far East Top, East Top and main top. Descended WSW where there is a way down crags. I ascended a moderately angled snow field – quite hard – to gain the ridge to Sgorr Ruadh. From summit descended SE. I tried to short-cut the path but had to climb down into the gorge of River Lair and then climb out again. It is better to join the path high up and keep to it. Snow above 500m, patchy at first. There was a lot of snow on Sgorr Ruadh – firm but soft on top. Clear, but overcast all day.