Green Brook is a minor river in Lancashire, England.
Hapton Clough is the product of Thorny Bank Clough and Tower Brook, which meet near Old Barn Farm, in Hapton.
From Spa Wood, Green Brook heads north, into one tunnel, which passes under the A679 Accrington Road, the Leeds and Liverpool Canal, the East Lancashire Railway Line, and the M65 Motorway, to emerge at Lowerhouse Lodges.
In Lowerhouse, it collects Sweet Clough, and turns west into Padiham, where it collects Shaw Brook, and then continues northwest, flowing into the River Calder in the centre of the town.
This article related to a river in England is a stub.