The Moffat hills are a range of hills in the Southern Uplands of Scotland. They form a distinctly triangular shape with a west facing side, a north facing side, and a south-east facing side. It is 17 kilometres from east to west across this triangle and some 16 kilometres north to south. The highest point is White Coomb at 821 m (2694 ft). The town of Moffat lies just south of the Moffat hills and along with Tweedsmuir, at the northern extremity, is the only centre of population around these hills. In some older maps the northern part of the Moffat Hills is called the Tweedsmuir Hills.
The west facing side of the Moffat hills is bounded by the River Annan and River Tweed -the source of both these rivers (which are little more than 1 kilometre apart at source) lie on this boundary. The Annan runs south into the Solway Firth but the Tweed heads north and then east to run through the border country to the North Sea at Berwick-Upon-Tweed.
Westward beyond the valley of the River Annan (Annandale) lies the main west coast corridor running northwards into Scotland, carrying the west coast railway line and the M74 motorway.
The next range of hills to the west is the Lowther hills and Durisdeer hills, wherein lies the source of the River Clyde.
The A701 road from Moffat to Edinburgh rises rapidly from Moffat and is soon high above Annandale. At Annanhead where the source of the River Annan is, the A701 reaches the height of 395 metres and looks down into the Devil's Beef Tub. This is the watershed between the Annan and Tweed systems and it lies in the administrative region called Dumfries and Galloway. The source of the Tweed is in Borders Region.