Beinn nan Aighenan is the forgotten Munro of the Starav range, being hidden away from Glen Etive by an intervening ridge. The usual route of ascent to this rocky summit is over the ridge, however, as any alternatives involve a very long approach.
Most of the route is on a path, but muddy in some parts, rough and rocky in others.
None.
Parking layby opposite start of Coiletir track.
The walk starts along the track leading down to Coiletir from the Glen Etive road; there is a good sized parking layby off the opposite side of the road. Head down this track and over the bridge over the picturesque River Etive. Beyond this a junction is reached - keep right here and follow the hydro track. At Coiletir a sign indicates a path round the cottage to the left, but it's much easier walking to stay on the hydro track that bypasses it to the right. Eventually the track reaches the Allt Mheuran.
Continue to the bridge, then turn left onto a boggy path on the far side, following the burn uphill; avoid the scar on the right left from the tempoary hydro track. When the path forks take the higher route - the lower path closer to the burn cuts across an eroded slope above a steep gorge further on whilst the older, higher route steers clear. A fairly faint path soon heads off right heading directly for Ben Starav; ignore this and continue on the broader path up the glen.
It is very boggy underfoot in places but the views, both ahead -with the Eas Mheirlich or Robber's Waterfall prominent over to the left - and looking back across Glen Etive, are a fine reward. The path soon comes closer to the Allt nam Meirleach and crosses a tributary coming down from Coire an Fhir-leith; beyond the Meirlich flows through a succession of box canyons and some care is needed in places (on the return it is natural to take a higher path which is further from the rim). The head of the glen climbs very steeply to the Bealach Lochain Ghaineamhaich but the path winds a clear route up to this pass.
You are now at the low point of the ridge between Ben Starav (right) and Glas Bheinn Mhòr (to the left). For Beinn nan Aighenan it is necessary to lose around 150m of height; two small paths head diagonally left down the far side of the bealach. Take the lower of these (the upper one peters out in a boulder field) and continue down and across the slopes to the southeast. Beinn nan Aighenan looks close at hand at first before the full drop down to the bealach is revealed. The path is small but makes its way down the rocky, slabby slopes to reach the low point.
The path continues by heading up the ridge to Beinn nan Aighenan. Again the climb is rocky and fairly steep in places but there are no great difficulties. As height is gained good views open up towards Loch Etive to the right - with Ben Cruachan prominent - and out towards Loch Tulla to the left. The slope becomes more gradual before the summit cairn is reached. Now the long walk back begins by heading back down the ridge to the bealach.
To return to Glen Etive, it is necessary to climb 150m back over the Bealachan Lochain Ghaineamhaich. From here you could extend the walk along the ridge to either of the other Munros; otherwise return the way you came back down the Allt nam Mheirleach.
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