The River Ayr Way is Scotland’s first source to sea long distance path. It covers a distance of 41 miles following the river Ayr from its source at Glenbuck Loch to the sea at Ayr. There is a real satisfaction in tracing the length of a river, and this route offers a variety of landscapes, starting in wild moorland rich in natural and industrial history, and following the growing Ayr as it becomes a powerful waterway, driving mills and carving a route through rocky gorges. The final section follows the river through open farmland and estates before reaching the historic county town of Ayr, finishing at the harbour.
https://www.walkhighlands.co.uk/glasgow/river-ayr-way.shtml