The River Irwell is a river in northwest England, flowing through the cities of Manchester and Salford. It stretches approximately 39 miles and is a tributary of the River Mersey. The river has played a significant role in the region's industrial history, serving as a vital waterway for transportation and trade. The Irwell is known for its scenic beauty, with parks and walking paths along its banks. It is also home to various wildlife, making it an important ecological area. The river has been the focus of several regeneration projects aimed at improving its surroundings and promoting recreational activities.