Cotwall End Valley is a local nature reserve in West Midlands, England.

It is about a mile south of Sedgley, in the Metropolitan Borough of Dudley.

It incorporates some of the grounds of Ellowes Hall, a stately home built in the early 19th century and demolished in 1964, which has led to the wooded part of the valley being known locally as "Ellowes Hall Wood".

It was declared a local nature reserve (LNR) by Dudley Metropolitan Borough Council in 1990.

[3] Turner's Hill, within the reserve at grid reference SO 909 918, area 1.56 hectares (3.9 acres), is a Site of Special Scientific Interest for its geology: important strata of the late Silurian period can be seen.