The River Lambourn is a small river located in the county of Berkshire, England. It is approximately 20 miles long and flows through the picturesque countryside, eventually joining the River Kennet. The river is known for its clear waters and is a vital habitat for various wildlife species. The Lambourn is also famous for its chalk stream, which provides a unique ecosystem. It is a popular spot for fishing and is often associated with the sport of fly fishing. The river's surroundings include charming villages, making it a scenic destination for walkers and nature enthusiasts.