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Jaudy, Guindy, BizienValleys to explore
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Around the Jaudy

The Jaudy, 48 km long, forms one of the most beautiful valleys in the Trégor region. At La Roche Derrien it becomes an estuary before joining the Bizien and Guindy rivers to form one of the most beautiful abers in Brittany. Classified as a nature reserve, the Aber is home to a remarkable array of flora and fauna, with its tides and wild landscapes.

Getting there

An estuary of prosperous towns

Etymologically, Tréguier refers to 3 rivers: the Jaudy, the Guindy and the Bizien. Its privileged location at the confluence of these rivers made it a prosperous city, one of the 7 historic bishoprics of Brittany.

Further upstream, another Petite Citée de Caractère (Small Town of Character) has taken advantage of its location to become a flourishing commercial town, exporting wine and flax products in particular.

A Mecca for the flax industry

The Jaudy and its tributaries contain numerous traces of activities linked to the flax industry. In addition to the port of La Roche Derrien, where the flax seeds arrived, the port of Pouldouran was home to the goémoniers, the seaweed gatherers who collected the seaweed in the estuary and used it to fertilise the fields. Flax production required water for retting, so many retting mills were built on the small streams feeding the Jaudy and Bizien rivers. Several of these sites have been restored and can be explored on the walking trails. If you follow the course of the rivers, you’ll also find traces of many old mills, which were used for a long time to dye flax.

A vast playground

The Mon Tro Breizh® route, which criss-crosses inland Brittany, gives pride of place to valleys and rivers, following the course of the Jaudy before reaching Tréguier via the Guindy valley and then continuing along the Bizien. A wide variety of landscapes and heritage treasures await the walker on these paths off the beaten track.

And what better way to discover the river than by kayak? Embark on the river or estuary side and venture into the wildest corners, such as the meandering Guindy. An immersive adventure in the heart of nature in these wooded valleys.

Remarkable natural areas

With its unspoilt valleys and sheltered estuaries subject to tidal variations, the Jaudy and its tributaries offer magnificent little corners of paradise, not only for walkers but also and above all for a vast array of wildlife, starting with birds. At the mouth of the river or in the sheltered areas of the Bizien and Guindy, seabirds and shorebirds like to come and rest, and it’s easy to spot them there.

The Jaudy is classified as a 1st category migratory fish river, a sign of the high quality of its environment, and attracts salmon in particular, much to the delight of anglers.

Gardens on the banks of the estuary

While the Pink Granite Coast is home to many iodised parks and gardens, two of the most renowned are on the banks of the Jaudy estuary, near Tréguier.

The gardens of Kestellic and Kerdola invite you to discover their magnificent grounds and collection of sometimes exotic plants. Take an afternoon stroll through these gardens and relax in a soothing setting beside the river.