The river in Arlesey

The River Hiz /hɪtʃ/ is a small (10 miles (16 km)) tributary river in Hertfordshire that feeds the River Ivel that, in turn, feeds the River Great Ouse. Starting at its source of a chalk fed spring just south of the village of Charlton, the river winds its way through the county of Hertfordshire, moving its way into and through Hitchin, where it meets the River Oughton and River Purwell. The Hiz finally meets the River Ivel near the village of Henlow.

The Hicca Way, inaugurated in 2012, is a footpath which follows the course of the river.

The Hiz is a focal point in the town of Hitchin, with a market that takes place historically by its banks. The Hiz also runs past the Arlesey Old Moat and Glebe Meadows nature reserve in Arlesey.

Although small, the Hiz attracts a great deal of wildlife. There are many birds around this area, which include swans, ducks, cootand kingfishers. Fish inhabit the river (trout mainly) and there is also evidence of otters.