Benn Bhreach lies at the southern end of a vast summit plateau known as Moine Bhealaidh. 4km north of Beinn Bhreach lies Beinn a' Chaorainn which is normally climbed in conjunction. The Moine Bhealaidh is featureless but the sheer size of the plateau itself gives the hills some character. Beinn Breach is a twin topped peak with the east top being the highest therefore the true summit. Beinn a Bhreach is surrounded in most directions by steep craggy slopes but the SW face gives rise to slightly easier terrain so therefore is the usual route of ascent. Beinn Bhreach and the Moine Bhealaidh give good views of the other Cairngorm Munros and from here on the 249th highest Munro you can appreciate just how massive the Gorms really are!
Most people normally start at Linn of Dee to the south where there is parking available and walk up through Glen Derry to reach the SW face of the Munro. There are other routes available but no matter how you approach the hill a long walk in is to be had due to the remoteness of it. Part of the way can be cycled on easy tracks as far as Derry Lodge to cut down on the ascent time.
Including Beinn a' Chaorainn will make this a long but extremely rewarding day on the hills especially if the walk is done in winter conditions.