The stream descends the 10 miles (16 km) through Macclesfield and The Carrs Park in Wilmslow, where it has a confluence with the River Dean, near Styal Prison.

It flows through the Styal country park and was used in the cotton calico factory there, Quarry Bank Mill, as a source of power.

For its final 10 miles (16 km) it defines the southwestern portion of the border between Greater Manchester and Cheshire before merging with the Mersey and the Manchester Ship Canal at Rixton Junction just north of Lymm.

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