The vast majority of Red Hills are located on low-lying coastal flats in tidal estuaries and in back-waters like Hamford Water between Harwich and Walton-on-the-Naze in Essex. They take the form of low mounds, ranging in size from about 200 square metres (equivalent to a 16m diameter circle) to a hectare (equiv.
Most Red Hills are found on flat coastal areas in tidal estuaries and backwaters like Hamford Water between Harwich and Walton-on-the-Naze in Essex. These hills typically form low, rounded mounds with sizes varying from 200 square metres to a hectare or more.