Down by the River
Its course is generally north-westerly, passing near to the town of Dalmellington, and through the villages of Patna, Dalrymple, and Alloway, birthplace of Robert Burns.
The source of the Doon is Loch Enoch, high in the Galloway Hills.
The Doon catchment is relatively narrow and there are few large tributaries below Loch Doon. The most significant of these are the Muck Water, Cummock Burn, Dunaskin Burn and Culroy Burn.
Common fish species include salmon, brown and sea trout, arctic charr, stone loach, eels, lampreys, pike and perch.