Entering West Sussex with the Sussex Border Path at Stansted Park, the Monarch's Way passes through Walderton and Stoughton, crossing Stoughton Down to West Dean. Here it crosses the A286 and River Lavant before climbing to the Trundle, on top of St Roche's Hill. Continuing east along a ridge the path passes Goodwood Racecourse and Goodwood Country Park. East of Goodwood the route diverts briefly north towards East Dean before heading south-east to Eartham. Here the path heads north-east along a section of Stane Street through Eartham Wood, before passing through the neolithic camp below Glatting Beacon and heading east down to the River Arun at Houghton. Remaining west of the river past South Stoke, it heads south through the park of Arundel Castle to the town of Arundel, where it crosses the Arun to Warningcamp. From here it continues east across the parish of Patching to Findon, passing near Cissbury Ring and climbing to meet the South Downs Way above Steyning for a short distance. Passing to the south of Steyning it crosses the River Adur at Bramber to Upper Beeding. After crossing Beeding Hill and Thundersbarrow Hill the path approaches the northern edge of the built-up area near Mile Oak, before doubling sharply back to the north of the A27 to continue east across the downs, before heading south down the former route of the Devil's Dyke railway towards West Blatchington. Crossing the built-up area south-eastwards towards Hove, it crosses Hove Park near Brighton & Hove Greyhound Stadium, before zig-zagging through the streets of Brighton to Brighton Pier. From here it runs westwards along the sea-front through Hove and Portslade, to Shoreham-by-Sea.