Lakes of North Yorkshire

is a glacial lake near the village of Malham in the Yorkshire Dales, England

Semerwater () is the second largest natural lake in North Yorkshire, England, after Malham Tarn. It is half a mile (800 m) long, covers and lies in Raydale, opposite the River Bain within Yorkshire Dales National Park. A private pay and display parking area is at the foot of the lake.