A clootie well is a holy well (or sacred spring), almost always with a tree growing beside it, where small strips of cloth or ribbons are left as part of a healing ritual, usually by tying them to branches of the tree (called a clootie tree or rag tree). Clootie wells are places of pilgrimage usually found in Celtic areas. It is believed the tradition comes from the ancient custom of leaving votive offerings in water.

In Scots, a clootie or cloot is a strip of cloth or rag.

In Scotland, by the village of Munlochy on the A832, is a clootie well (called in Scottish Gaelic: Tobar Churadain) at an ancient spring dedicated to Saint Curetán, where rags are still hung on the surrounding bushes and trees. Here the well was once thought to have had the power to cure sick children who were left there overnight. The site sometimes needs to be cleared of non-biodegradable materials and rubbish such as electrical items and a venetian blind.

In the heart of Culloden woods near the battlefield is a walled clootie well also known as St Mary’s well. This well was traditionally visited on the first Sunday in May. Until recently, it was a popular holiday, with an ice-cream van situated in the car park. However, this tradition is now in decline although still marked.

Craigie Well at Avoch on the Black Isle has both offerings of coins and clooties. Rags, wool and human hair were also used as charms against sorcery, and as tokens of penance or fulfilment of a vow.

A clootie well once existed at Kilallan near Kilmacolm in Renfrewshire. This holy well was dedicated to St Fillan and cloth was tied to overhanging shrub branches.