| Stage | Description | OS Grid |
| Start from carpark for the Grey Mare's Tail Waterfall | NT18671450 |
| 1 | Head NW on path past the waterfall | NT18061518 |
| 2 | Continue NW on path to Loch Skeen | NT17451595 |
| 3 | Bear W along South shore of Loch | NT17251592 |
| 4 | Ascend NW to top of steep narrow ridge | NT16261654 |
| 5 | Head SW to the broad flat summit of Donald's Cleuch Head | NT15381604 |
| 6 | Continue S on broad ridge to Firthope Rig | NT15331538 |
| 7 | Bear E turning ESE to the summit of White Coomb | NT16341509 |
| 8 | Select route with care SE through crags to forest edge | NT16861482 |
| 9 | Head E to Upper Tarnberry (546m) | NT17651495 |
| 10 | Descend ENE to join ascent path | NT18061518 |
| 11 | Follow path SE to car park | NT18671450 |