Ascents
Because of a lack of good access paths from the south (Glen Falloch), Ben Oss is usually climbed from the area just south of Tyndrum, with the usual start being at Dalrigh (grid reference NN343292) on the A82 road. Many guide books recommend climbing Ben Oss with Beinn Dubhchraig from Dalrigh and this allows for a less steep approach over Dubhchraig and then continuing to Ben Oss via the Bealach Buidhe. A circular walk around the head of the Cononish valley can be continued over Ben Lui and Beinn Chuirn to finish again at Dalrigh. The summit of the mountain is flattish and the medium size cairn stands on an area of large slabby rocks interspersed with grass. The summit has a prominence of 342 metres and gives a fine vista of the southern highlands, it is a good place to admire the craggy eastern face of neighbouring Ben Lui.
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