An Riabhachan lies in a group of 3 Munros that rise from the northern shores of Loch Mullardoch. It is normally climbed with is neighbour An Socach to the west and some may even combine with Sgurr na Lapaich to the east but there is a fairly large descent and re-ascent to include this Munro. An Riabhachan is the middle peak in this long ridge that runs E-W the entire length of the loch.
An Riabhachan has mainly grassy faces but considerably more rocky to the NE. The summit ridge continues NE before splitting to form 3 separate ridges. The north ridge drops down to Meal Garbh round the western rim of Coire Ganda. The east ridge continues over to neighbouring Munro Sgurr na Lapaich via a rocky traverse round the head of Coire Ganda. This is a fantastic traverse over rocky terrain with plenty of scrambling opportunities. Coire Ganda is an impressive corrie housing two picturesque little lochans Loch Mor and Loch Beag (Big Loch, Small Loch). The SW ridge from the summit of An Riabhachan leads to several subsidiary tops of An Riabhachan and on to neighbouring Munro An Socach and is much less appealing, being wide and featureless. There is parking available to the north at the power station which is approached via minor roads. Most people start here and attack An Riabhachan via its east ridge.