Salisbury Half Marathon Summary Whether you’re chasing a personal best or are new to the half-marathon world, the Salisbury Marathon is a great day out. One of the most popular half marathons in the South, the race boasts a super flat course, a great atmosphere and a tour of some of the most beautiful landmarks in the City. Salisbury is also the home of the Trust's UK office and we’d love to see you here! Registration Sign up to the Salisbury Half Marathon How much will it cost? There’s no registration fee however a minimum sponsorship of £175 per person is required.