The usual ascent of Baosbheinn starts at a parking place at the Red Barn on the A832 road (). Most walking guidebooks recommend climbing Baosbheinn along with Beinn an Eoin, this calls for the ascent of Beinn an Eoin first, however a direct ascent of Baosbheinn is possible although the crossing of the river, the Abhainn a' Gharbh Choire can be difficult in spate conditions. The walk goes SE on the track which leads to Loch na h-Oidhche, the early part of the track goes through a recently sown plantation just to the East of Loch Bad na Sgalag where over 1 million trees of native species have been planted. The original trees in this area were cut down in the 16th and 17th centuries to feed the ironworks on the shore of Loch Maree. The track is left after and the ridge of Baosbheinn can be attained by crossing pathless moorland.