Clayhill Brook is a small stream in southern England, in the county of Berkshire. It rises at Benham's Gulley in the far West of Burghfield Common and runs through the Northern edge of the Village, forming the border between Burghfield Parish and Sulhamstead Parish. The brook, running to the North East, passes through woodland, Omer's Gully, at the edge of the village. The woodland and the brook is a haven for local wildlife in the area, and is a particularly important resource in this respect. At the eastern end of Omer's Gulley, and to the North Eastern End of Burghfield Common, the brook is forded at Ash Lane. It continues North to Northeast past another woodland, Clayhill Copse, and then past Stud Farm and towards Burghfield Village. Along this course of the stream is a sewage treatment works which serves the local communities. Skirting between Burghfield Village and the hamlet of Trash Green, the brook continues Northeast, past Green Farm, under the M4 motorway, and past the gravel pits at Pingewood, running close by to Burghfield Mill. It joins the River Kennet just to the East of Burghfield Mill, no longer a working mill, but converted to residential apartments.