The Lyne Water is a tributary of the River Tweed that rises in the Pentland Hills of southern Scotland at Baddinsgill Reservoir. It runs through West Linton and Romannobridge, passes Flemington and Lyne Station and enters the Tweed west of Peebles. It floods regularly in winter and occasionally in summer. There is free fishing above Flemington Bridge, and below Flemington fishing in the river is administered by the Peebles fishing authority.