The 8th edition of the Rasselbock Backyard Ultra in Sherwood Pines Forest Park in Nottinghamshire. Competitors complete a precisely measured 4.167-mile loop every hour, on the hour, until only one runner remains. The course runs through compacted earth and gravel forest trails through pine woodland. Includes full chip timing, live streaming of the entire event, and free parking for one vehicle. The UK female record has been broken at this event in multiple consecutive years.