The River Dean rises at Longclough in Macclesfield Forest on the western edge of the Peak District foothills above the village of Rainow in north east Cheshire, England.

Rainow is a village and civil parish in Cheshire, England, in the valley of the River Dean and next to the B5470 road between Macclesfield and Kettleshulme. It straddles the eastern side of the Peak D