Arundel Castle and Hiorns Tower loop from Amberley — South Downs National Park

Embark on the Arundel Castle and Hiorns Tower loop from Amberley, a difficult hiking trail that promises varied terrain and expansive views across the South Downs. This challenging route covers 12.9 miles (20.8 km) with an elevation gain of 1149 feet (350 metres), typically taking around 5 hours and 44 minutes to complete. You will navigate easily accessible paths, unpaved tracks that can be muddy, and sections with steps, kissing gates, and stiles. The trail winds through riverbanks, woodlands, and downland, offering glimpses of the majestic Arundel Castle and the distinctive Hiorne Tower, a Gothic folly overlooking Swanbourne Lake.

Planning your visit requires very good fitness due to the trail's length and elevation changes. Be prepared for varied conditions; sturdy walking boots are essential, especially during wetter months when chalky clay can make paths slippery. You will encounter quiet road sections and an unsignalled railway crossing, so stay alert. The route also passes through meadows and fields where you might share the path with grazing cattle and sheep. Consider starting early to make the most of the daylight, particularly given the duration of the hike.

This loop is nestled within the beautiful South Downs National Park, offering classic English countryside vistas. Beyond the impressive Arundel Castle, a nearly 1,000-year-old fortress, you will discover the unique Hiorne Tower, built in the 19th century and even featured in Doctor Who. The trail often follows the meandering River Arun, providing serene riverside paths and opportunities to spot wildlife. You will also pass through charming historic villages like Burpham and South Stoke, showcasing traditional English architecture and history.