Alone. I left the car near the Fersit turn off and walked along a path (shown on the map) to join a forestry track (not shown on map but approximately on the line of a path shown on the map to start with, then turns N). I went up a fire break and on the bank of Allt Ruadh Mor and so to the summit of Beinn Teallach. There is a large cairn not on the summit and a smaller cairn which is. I returned the same way. There was snow, mostly hard.