The parish of Harlton covers an area of . Its southern border is marked by the ancient track
Mare Way, which runs along a raised ridge dividing it from
Barrington (plus a short border with
Orwell). The Bourn Brook forms its northern boundary with
Comberton, and its western border with
Little Eversden mostly follows the Roman Road (now the A603). Field boundaries and old water channels divide it from
Haslingfield to the east. There is a very short border with
Barton at its north-eastern tip. In a hypothesis, the valley of the
Bourn Brook, Cambridgeshire is put forward as the location of the
Battle of Brunanburh fought in 937. The battle, the location of which is unknown and has been speculated to have taken place in over 40 locations from South West England to Scotland, is suggested to have taken place close to the brook, on the open fields of
Haslingfield, Harlton and
Little Eversden. The village was an important source of mining for many centuries. The pits to the south east of the village were used to mine the
clunch that was used to build
Cambridge Castle in 1295. The quarry was last used for building material in 1906 and it is now a heavily wooded recreation area. The
clay quarry to the south-west of the village was known as the Lady Quarry from the 15th century but is now filled in.
Gravel was mined alongside the Bourn Brook from at least the 15th century, and
coprolite digging provided employment for the second half of the 19th century. The Manor House was listed as 'Huntingfield Manor' in the 1300s on the British History Online website. ==Church==