The Little Avon River rises from a point upstream to the east of Wickwar[1] in Gloucestershire, flowing north-west for 15 kilometres (9.3 mi), near Charfield, Stone and Berkeley, before finally joining the River Severn.

The river runs through sandstone and clay, while the source water has been affected by the limestone from where it rises.

By the time the river reaches Berkeley, it is sheltered from the tide using tidal gates.

[3] Rare species of conservation interest including white-clawed crayfish, water voles, bullheads and eels are known to live in the catchment.

[3] Ten species from the UK Biodiversity Action Plan have been recorded, as well as several from the IUCN Red List.