The Léguer River is a river located in the Côtes-d'Armor department in Brittany, France. It flows for approximately 30 kilometers before emptying into the English Channel at the town of Lannion. The river is known for its scenic beauty and is surrounded by lush landscapes, making it a popular spot for outdoor activities. The Léguer River is part of the larger Rance River basin and plays a vital role in the local ecosystem. It supports various wildlife and plant species, contributing to the biodiversity of the region. The river also has historical significance, with several ancient sites located along its banks.