Leen is a small river that flows through the county of Nottinghamshire in England. It is a tributary of the River Trent and is approximately 27 miles long. The river rises in the hills near Annesley and flows through the towns of Hucknall, Bulwell, and Basford before joining the River Trent at Colwick. The Leen has played an important role in the history of Nottinghamshire, providing water for industry and transportation.
The Leen Valley is an important wildlife habitat, with a variety of plants and animals living along its banks. The river is home to a number of fish species, including brown trout, chub, and roach. The surrounding woodland and meadows provide a habitat for birds such as kingfishers, herons, and woodpeckers. The Leen Valley is also a popular destination for walkers and cyclists, with a number of footpaths and cycle routes running alongside the river.
Despite its importance, the Leen has suffered from pollution and neglect in the past. However, in recent years, efforts have been made to improve the river's water quality and restore its natural habitats. The Leen Valley Improvement Scheme, launched in 2012, aims to create a more attractive and accessible environment for both people and wildlife. The scheme includes measures such as planting new trees and wildflowers, improving footpaths and cycle routes, and reducing pollution from nearby roads and industry.