This is a beautiful stretch of the river Chelmer. Try downstream from Hoemill Bridge and lock, or walk for a mile upstream on towpath to secluded Rushes Lock (51.75086, 0.59836). You will pass the pretty little church of Ulting on the opposite bank (please do not swim from the churchyard). Wide, deep section used by pleasure crafts and slightly brown, but water is some of the cleanest of any Essex river. 2m deep.