The River Dulais is a river located in Wales, flowing through the Dulais Valley. It is a tributary of the River Neath, contributing to the region's water system. The river is approximately 10 miles long and is known for its scenic beauty and natural surroundings. The river's course is characterized by a mix of rural landscapes and industrial history, reflecting the area's past. It supports local wildlife and offers recreational opportunities such as walking and fishing. The Dulais Valley is also recognized for its rich coal mining heritage, which has shaped the region's development.