Milldown is a hill in the Rhinns of Kells, a sub-range of the Galloway Hills range, part of the Southern Uplands of Scotland.

It is located immediately north of Meikle Millyea - between these two hills lie the Lochans of Auchniebut, a series of small water bodies at an approximate elevation of 650m - possibly the highest permanent water bodies in the Southern Uplands.

As well as this, the hill is also flanked on its SW side by forest plantation - possibly the highest planted commercial forestry in the Southern Uplands.

Like most of its neighbours, it is most easily climbed from the east at Forrest Lodge.

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