The average annual rainfall in the catchment of the Llugwy is the highest recorded in England and Wales.

On entering Betws-y-Coed it is crossed by the Miner's Bridge, a curious wooden bridge set at a steep incline over the river, and shortly after passing under Pont-y-pair road bridge it flows beside the main street before its confluence with the Conwy at the northernmost end of the golf course.

The Llugwy was a favourite of many well-known Victorian artists such as Frederick William Hulme.

[citation needed] River Llugwy was a place of death of the painter James William Whittaker (1828–1876), who fell there trying to collect his painting gear and drowned.

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