The Whiteadder Reservoir is a man-made reservoir in the Lammermuir Hills in East Lothian, on the border of the Scottish Borders The reservoir is situated about 11 miles from Duns on the B6355. Leave Duns on the A6112 and turn left onto the B6355. Travel along this road for several miles, passing over the Whiteadder Water at Ellemford Bridge and continue through the Lammermuir Hills before reaching the reservoir. Cross into East Lothian and up a hill with the reservoir to your left.
There are several places to park near to the water to enjoy the peace and observe the wildlife or continue until the road crosses the water at the northern end where there is a small car park and a path along the waters edge. From the cattlegrid a walking route follows the the old Herring Road to Priestlaw Hill.