Knott Rigg is a fell at the head of the Newlands Valley in the English Lake District.

It is situated some 8+1⁄2 kilometres (5+1⁄4 mi) south west of Keswick and has a modest height of 556 metres (1,824 feet).

The Ard Crags ridge is an example of the Buttermere Formation, an olistostrome of disrupted, sheared and folded mudstone, siltstone and sandstone.

[1] The easiest ascent of Knott Rigg is started from the car park at Newlands Hause (grid reference NY192176).

An alternative start can be made from further down the Newlands valley, either at Keskadale Farm or Rigg Beck.