Loughrigg Tarn is a small, natural lake surrounded by grassy slopes and rocky crags. It covers only around 17 acres and has a shoreline which stretches for just over half a mile. It lies at the foot of Loughrigg Fell to the north of the village of Skelwith Bridge.
Loughrigg Tarn belongs to the National Trust, but weekly and daily fishing tickets are available from neighbouring Tarn Foot Farm for dace, eels, perch, pike, roach, tench and trout. No boating is allowed. In summer, the tarn is bright with water lilies and other aquatic plants in summer; and there are magnificent views of the Langdale Pikes on clear days. There is no car park, but a path runs from the road nearby.