Ingrebourne is a river located in Essex, England. It flows through the London Borough of Havering and eventually joins the River Thames. The river is approximately 10 miles long and is known for its natural beauty and wildlife habitats. The surrounding area of Ingrebourne includes parks and nature reserves, such as the Ingrebourne Valley and Ingrebourne Hill. These spaces provide opportunities for outdoor activities like walking, cycling, and birdwatching, making it a popular destination for both locals and visitors.