This is said to commemorate Saint Eonan turning back an outbreak of bubonic plague at the farmstead of Slatich, several kilometres to the west; the nearby village of Fortingall had earlier been decimated leaving only one survivor.

[5] Càrn Mairg is the high point on an east-west ridge which connects to the adjoining Munro of Meall Garbh which lies 3.5 km to the west.

Càrn Mairg stands on the Chesthill Estate, whose main activities are farming, fishing and deer stalking.

The estate have also requested that the round of the Càrn Mairg Munros is done from west to east (clockwise) to lessen disturbance to deer management.

The terrain of the Càrn Mairg range is similar to high, rolling moorland with only small depressions between the four Munros, a landscape which is suitable for ski mountaineering and has been likened to the Cairngorms, however the circuit of the hills is a long walk being almost 18 km in length.