We were a well equipped fellwalking club, in good weather, ages 45-67. We had done the Buachaille Etive Mor ridge walk as described in 'Classic Walks' (page 71). The descent from Stob na Broige is then described in just one sentence, i.e. 'The descent to Allchaorunn is a long, steep mile'. In addition, there is a sketch map that points to a little bridge at NN198513 so we took a bearing, heading towards Allchaorunn and estimated 2 hours down to the road. The upper section is fine steep walking but in the bottom 1000-ft we encountered small crags: taking no chances, we circumnavigated these but then found another line of small crags. It took us over an hour to probe , left and right, to find a non-climbing route passed these two/three sets of crags. Fortunately, we had the time, good weather and energy to find a safe walking route down reaching the road 8 hours after starting from NN220520.