NH1637158542 From the station car park go west, cross the main road, pass an old red phone box and go over a stone bridge. Immediately turn right through a gate with a footpath sign, and follow the track to some water treatment works. Go through a gate (another footpath sign) to join a well-used path on the east bank of the Allt Achadh na Sine. Steep and muddy in places, this trail shadows the burn up towards the broad, boggy col between Fionn Bheinn and Meall a' Chaorainn.

NH1507960037 When level with a little dam, bear right and climb the grassy-and-boggy southwest flank of Creagan nan Laogh. As height is gained the ground begins to get less sloppy underfoot. Having crossed the shoulder of Creagan nan Laogh, continue up the final slope leading to the summit ridge of Fionn Bheinn, and the edge of the dramatic corrie of Toll Mor, hitherto hidden. Turn left to follow the well defined ridge up to the summit trig point.

NH1473862148 Retrace your steps east down the ridge, and over a broad un-named top which leads to the slopes overlooking Toll Beag, Fionn Bheinn's second northern corrie. A clear path descends the grassy slopes above this corrie to reach an old stone wall. Though the path can be very wet, and the wall is intermittent, it provides a useful navigational handrail heading downhill, roughly southeast, to bisect an old path after about 1.5km (it's not worth turning off sooner).

NH1745761202 Turn right onto this path, which is a bit grassy but easily followed, descending across boggy ground to reach a gate in a deer fence. Shortly after that, enter the Achnasheen Plantation, and carry on down to the A832. Follow the verge, or the adjacent pastures if you're worried about the very fast traffic, back to Achnasheen.