March River is a river located in the eastern part of Cambridgeshire, England. It flows through the town of March and eventually joins the Nene River. The river is approximately 10 miles long and is known for its scenic views and natural habitats. The March River is part of the Great Ouse catchment area and plays a role in local agriculture and wildlife. It supports various species of fish and birds, making it a popular spot for fishing and birdwatching. The river also contributes to the area's drainage system, helping to manage water levels in the surrounding landscape.