High Rigg is strictly the continuation of the ridge running up the western shore of Thirlmere, whose high point is Raven Crag. This forms the watershed between the Shoulthwaite and Thirlmere/ Vale of St John systems. The depression between High Rigg and Raven Crag to the south — at only around 550 ft
High Rigg resembles a model of the Lakeland Fells in miniature, complete with crags, intermediate tops, tarns and even a 'pass' crossing the ridge halfway along, complete with church. The northern and southern aspects of the fell are largely grassed and gently rolling, in contrast to the western and eastern flanks which are steep with numerous rocky outcroppings and cliffs.