This is a long and rather strenuous walk covering two great Munros with fantastic views to the north. Be aware that there may be two rivers you need to cross on foot.
The walks starts at the car park at NN 312 437, this is the closest point on the track to Achallader where you can park. Follow the track to Achallader farm. Take the track that starts before getting to the ruined tower and follow this for 4km, over 2 fords and the Water of Tulla.
At NN 352 468, watch out for a signpost on the right that directs you to the bridge at NN 353 468. This bridge no longer exists: it seems to have been washed away over the winter. However, we were able to move slightly up from this point and wade across.
After drying out your socks and lacing up your boots, head up the side of the Dun Aigheannach woodland. Head for the underpass under the railway (Harry Potter fans may recognise the railway!) NN 359 466. Follow the Allt Coire an Lochain for 2km along a small path until you get to Lochan a Chreachain: this is a great place to stop for lunch, bathe the feet, and take in the stunning views to the north.
After lunch, head up Coire an Lochain and follow the ridge up to the first munro Beinn a Chreachain (1081m, Hill of the Rocks). From here it’s a fairly easy meander along the ridge for 2.5km to the bottom of the last steep ascent up Beinn Achaladair (1036m Hill of the field near the hard water). This last climb up to Beinn Achaladair is a bit steep and scrambly for a short section, but there is a path to follow. From the top of Beinn Achaladair head south west to NN 341 425. From here it is possible to descend slowly (it is steep!) down towards the footpath on the other side of Allt Coire Achaladair. Follow this path for 1.5km down the side of the river back to railroad. Cross the bridge and follow the signposts back to the car park.
Finally, why not stop off at the Bridge of Orchy Hotel on the way back for a well deserved refreshment!