The Cheriton Stream forms the upper part of the River Itchen. The Group is principally concerned with the stretch up to Cheriton Mill between Cheriton and Tichborne.
There are three tributaries which are described on separate sub pages. They link eventually just north of Cheriton village. With all three streams conjoined the Cheriton Stream then flows North, parallel to the B3046
to Cheriton Mill.