Trefriw is a village on the River Conwy in north Wales, lying a few miles south of the site of the Roman camp of Canovium, sited at Caerhun.

Trefriw forms part of the county borough of Conwy in Snowdonia, lying to the north-west of Llanrwst, and about 4½ miles north of Betws-y-coed by road. It is located on the western slopes of the glaciated Conwy valley, the village having been largely built in a semi-circle at the point where the river Crafnant flows from its hanging valley to join the River Conwy.
Apart from its reputation as a good starting point for walks, Trefriw is today mostly known for its woollen mills, and for the nearby chalybeate spa, first known to have been used by the Romans and further developed in about 1700 its waters were one of very few throughout Europe to have been classified as a medicine due to their high iron content.
Trefriw today is a tourist destination. By car it is only a 10 minute drive to Betws-y-coed, and within 30 minutes drivers can reach either the coast or the mountains. The village is set in a landscape of hills, forests and lakes. Today the village has two pubs and a hotel and there is other B&B accommodation locally. Many visitors come to walk in the area, and Llyn Geirionydd and Llyn Crafnant can be easily reached on foot. The latter is very popular, and many would agree that "the (view along Llyn Crafnant) is one of the most breathtaking views in all Snowdonia." (Forest Park guide, 2002). There is a series of walking trails in the area (see the "Trefriw Trails" link below) but many also start here for longer walks into the Gwydir Forest, or the Carneddau mountains, the latter via Llyn Cowlyd which, although less scenic than Crafnant and Geirionydd, has a wild appeal of its own.
Many visitors came to the village to visit the Trefriw Woollen Mills and Trefriw Wells Spa.
Nearby, on the road to the neighbouring town of Llanrwst lies Gwydir Castle, which is set within a Grade 1 listed, 10-acre garden. Built by the Wynn family c1500 (see John Wynn, 1st Baronet), Gwydir is an example of a Tudor courtyard house, incorporating re-used medieval material from the dissolved Abbey of Maenan. Further additions date from c1600 and c1826. The important 1640s panelled Dining Room has now been reinstated, following its repatriation from the New York Metropolitan Museum. (see external link below)
Many cyclists come to the area to ride the "Marin Trail", a competition standard route in Gwydir Forest.