Hilly Fields is a 37.5 hectare Local Nature Reserve in Colchester in Essex. It is owned and managed by Colchester Borough Council. It is also a Scheduled Monument as it is in a late Iron Age site and Roman Camulodunum. The site has diverse habitats of grassland, woods, hedges, scrub, ponds and marsh. The grassland is grazed by rabbits, and invertebrates include minotaur beetles and bee wolf wasps. The woodland is mainly oak, ash and hawthorn, and the pond banks have reedmace and reed sweet-grass. There is access from Sussex Road.