Your chance to run at the Winter Residence of the Royal Family - the Sandringham Estate and surrounding roads and trails, while raising thousands of pounds for good causes. 10K - with a Start and Finish within the Sandringham Estate, the event boasts a scenic route with stunning views of the Norfolk Countryside. 5K - with a Start and Finish within the Sandringham Estate, including passing directly in-front of Sandringham House, the event boasts a scenic route with stunning views of the Norfolk Countryside.