The River Leven (pron. levven) is a short river in the county of Cumbria, falling within the historic boundaries of Lancashire. It drains Windermere from its southernmost point and flows for approximately eight miles (13 km) into the northern reaches of Morecambe Bay. The river and its estuary are the boundary between the Cartmel Peninsula and Furness Peninsula in the area once known referred to as Lancashire north of the sands. The upriver limit of tidal flow is close to the village of Haverthwaite. Also at this point is to be found Low Wood Bridge which, until the coming of the railways, was the first bridging point across the river. The Leven is navigable upstream as far as Low Wood, and downstream from Windermere to Newby Bridge.