This route circles the central Chew Valley in Somerset County. Maes Knoll, one of the peaks, is an iron age hill fort dating back to 250 BC, which provides commanding views across the Chew Valley to the Mendip Hills in the south, central Bristol to the north, the outskirts of Bath and the Cotswolds to the east, and across the River Severn into Wales to the northwest. There is no defined start / finish point - anywhere along the loop is fine. The description below is taken from the Long Distance Walker's Association webpage: https://ldwa.org.uk/ldp/members/show_path.php?path_name=Three+Peaks+Circular+Walk+%28Avon%29
An idyllic countryside walk, the Three Peaks Circular Walk covers 16.5 miles of hilly, field-footpath terrain. The route takes you around Pensford, Clutton and Chew Magna and the 'peaks' are Maes Knoll, Knowle Hill and Blackberry Hill - it's reasonably challenging, although not nearly as severe as the Three Peaks in Yorkshire!