Add page to My Herts Further actions Print this page Castle Park (Grade 2) Advice for walkers. Before joining your first walk, please register online and bring your reference number with you, or just turn up 10 minutes early and fill in a registration form on the day. Categories East Herts Grade 2: Easy/moderate, 45 minutes, about 2 miles, moderate hills, no stiles. When 26 September 2017 at 11:00 - 11:45 Prices Child: Free Adult: Free Venue Castle Park, Bishop's Stortford The entrance of Castle Park, by the Link Road car park The Causeway Bishop’s Stortford Hertfordshire CM23 2EL