An 80 km (50 mile) point-to-point ultramarathon along the South Downs Way National Trail from Worthing to Eastbourne, with approximately 1,750 m of ascent. The route follows chalk ridgeway across open downland, combining bridleways, grass paths and sections of compact trail. Elevation is accumulated through sustained rolling climbs rather than extended mountain ascents, with exposed conditions possible on higher sections. Underfoot surfaces are typically firm but can become slippery in wet weather, particularly on chalk. The course is fully marked with aid stations positioned along the route in accordance with Centurion Running event logistics.