Càrn Mairg stands on the Chesthill Estate, whose main activities are farming, fishing and deer stalking. Prior to the Land Reform (Scotland) Act 2003 there was some animosity between the estate and hill walkers over access to the Càrn Mairg hills. At one point the estate put a locked gate at the start of the walk at Invervar. Since the 2003 legislation, the estate has built a car park for walkers at Invervar which only holds eight cars and they request that walkers go elsewhere when the car park is full in an effort to keep a limited number of walkers on the hills. 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.